Nuvoton: I2C: Fix potential role switch failure

Fix in i2c_do_trsn(), interrupt doesn't change back to enabled due to premature return.

Fix targets:
-   NUMAKER_PFM_NANO130
-   NUMAKER_PFM_NUC472
-   NUMAKER_PFM_M453
-   NUMAKER_PFM_M487/NUMAKER_IOT_M487
-   NUMAKER_IOT_M252
-   NUMAKER_IOT_M263A
-   NU_M2354

targets/TARGET_NUVOTON/TARGET_M2354/i2c_api.c

@@ -441,13 +441,13 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         case 0x08:  // Start
         case 0x10:  // Master Repeat Start
             if (i2c_ctl & I2C_CTL0_STA_Msk) {
-                return 0;
+                goto cleanup;
             } else {
                 break;
             }
         case 0xF8:  // Bus Released
             if ((i2c_ctl & (I2C_CTL0_STA_Msk | I2C_CTL0_STO_Msk)) == I2C_CTL0_STO_Msk) {
-                return 0;
+                goto cleanup;
             } else {
                 break;
             }
@@ -458,6 +458,8 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         }
     }
 
+cleanup:
+
     i2c_enable_int(obj);
 
     return err;

targets/TARGET_NUVOTON/TARGET_M251/i2c_api.c

@@ -425,13 +425,13 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         case 0x08:  // Start
         case 0x10:  // Master Repeat Start
             if (i2c_ctl & I2C_CTL0_STA_Msk) {
-                return 0;
+                goto cleanup;
             } else {
                 break;
             }
         case 0xF8:  // Bus Released
             if ((i2c_ctl & (I2C_CTL0_STA_Msk | I2C_CTL0_STO_Msk)) == I2C_CTL0_STO_Msk) {
-                return 0;
+                goto cleanup;
             } else {
                 break;
             }
@@ -442,6 +442,8 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         }
     }
 
+cleanup:
+
     i2c_enable_int(obj);
 
     return err;

targets/TARGET_NUVOTON/TARGET_M261/i2c_api.c

@@ -430,13 +430,13 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         case 0x08:  // Start
         case 0x10:  // Master Repeat Start
             if (i2c_ctl & I2C_CTL0_STA_Msk) {
-                return 0;
+                goto cleanup;
             } else {
                 break;
             }
         case 0xF8:  // Bus Released
             if ((i2c_ctl & (I2C_CTL0_STA_Msk | I2C_CTL0_STO_Msk)) == I2C_CTL0_STO_Msk) {
-                return 0;
+                goto cleanup;
             } else {
                 break;
             }
@@ -447,6 +447,8 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         }
     }
 
+cleanup:
+
     i2c_enable_int(obj);
 
     return err;

targets/TARGET_NUVOTON/TARGET_M451/i2c_api.c

@@ -448,14 +448,14 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         case 0x08:  // Start
         case 0x10:  // Master Repeat Start
             if (i2c_ctl & I2C_CTL_STA_Msk) {
-                return 0;
+                goto cleanup;
             }
             else {
                 break;
             }
         case 0xF8:  // Bus Released
             if (i2c_ctl & (I2C_CTL_STA_Msk | I2C_CTL_STO_Msk) == I2C_CTL_STO_Msk) {
-                return 0;
+                goto cleanup;
             }
             else {
                 break;
@@ -472,6 +472,8 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         }
     }
 
+cleanup:
+
     i2c_enable_int(obj);
 
     return err;

targets/TARGET_NUVOTON/TARGET_M480/i2c_api.c

@@ -432,13 +432,13 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         case 0x08:  // Start
         case 0x10:  // Master Repeat Start
             if (i2c_ctl & I2C_CTL0_STA_Msk) {
-                return 0;
+                goto cleanup;
             } else {
                 break;
             }
         case 0xF8:  // Bus Released
             if ((i2c_ctl & (I2C_CTL0_STA_Msk | I2C_CTL0_STO_Msk)) == I2C_CTL0_STO_Msk) {
-                return 0;
+                goto cleanup;
             } else {
                 break;
             }
@@ -449,6 +449,8 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         }
     }
 
+cleanup:
+
     i2c_enable_int(obj);
 
     return err;

targets/TARGET_NUVOTON/TARGET_NANO100/i2c_api.c

@@ -468,14 +468,14 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         case 0x08:  // Start
         case 0x10:  // Master Repeat Start
             if (i2c_ctl & I2C_CON_START_Msk) {
-                return 0;
+                goto cleanup;
             }
             else {
                 break;
             }
         case 0xF8:  // Bus Released
             if ((i2c_ctl & (I2C_CON_START_Msk | I2C_CON_STOP_Msk)) == I2C_CON_STOP_Msk) {
-                return 0;
+                goto cleanup;
             }
             else {
                 break;
@@ -492,6 +492,8 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         }
     }
 
+cleanup:
+
     i2c_enable_int(obj);
 
     return err;

targets/TARGET_NUVOTON/TARGET_NUC472/i2c_api.c

@@ -465,14 +465,14 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         case 0x08:  // Start
         case 0x10:  // Master Repeat Start
             if (i2c_ctl & I2C_CTL_STA_Msk) {
-                return 0;
+                goto cleanup;
             }
             else {
                 break;
             }
         case 0xF8:  // Bus Released
             if (i2c_ctl & (I2C_CTL_STA_Msk | I2C_CTL_STO_Msk) == I2C_CTL_STO_Msk) {
-                return 0;
+                goto cleanup;
             }
             else {
                 break;
@@ -489,6 +489,8 @@ static int i2c_do_trsn(i2c_t *obj, uint32_t i2c_ctl, int sync)
         }
     }
 
+cleanup:
+
     i2c_enable_int(obj);
 
     return err;