STM32: pins: move pin_lines_desc table to const

targets/TARGET_STM/TARGET_STM32F0/gpio_irq_device.h

@@ -53,7 +53,7 @@ typedef struct exti_lines {
 } exti_lines_t;
 
 // Used to return the index for channels array.
-static exti_lines_t pin_lines_desc[16] =
+static const exti_lines_t pin_lines_desc[16] =
 {
     // EXTI0_1
     {.gpio_idx = 0, .irq_index = 0, .irq_n = EXTI0_1_IRQn}, // pin 0

targets/TARGET_STM/TARGET_STM32F1/gpio_irq_device.h

@@ -58,7 +58,7 @@ typedef struct exti_lines {
 } exti_lines_t;
 
 // Used to return the index for channels array.
-static exti_lines_t pin_lines_desc[16] =
+static const exti_lines_t pin_lines_desc[16] =
 {
     // EXTI0
     {.gpio_idx = 0, .irq_index = 0, .irq_n = EXTI0_IRQn}, // pin 0

targets/TARGET_STM/TARGET_STM32F2/gpio_irq_device.h

@@ -85,7 +85,7 @@ typedef struct exti_lines {
 } exti_lines_t;
 
 // Used to return the index for channels array.
-static exti_lines_t pin_lines_desc[16] =
+static const exti_lines_t pin_lines_desc[16] =
 {
     // EXTI0
     {.gpio_idx = 0, .irq_index = 0, .irq_n = EXTI0_IRQn}, // pin 0

targets/TARGET_STM/TARGET_STM32F3/gpio_irq_device.h

@@ -58,7 +58,7 @@ typedef struct exti_lines {
 } exti_lines_t;
 
 // Used to return the index for channels array.
-static exti_lines_t pin_lines_desc[16] =
+static const exti_lines_t pin_lines_desc[16] =
 {
     // EXTI0
     {.gpio_idx = 0, .irq_index = 0, .irq_n = EXTI0_IRQn}, // pin 0

targets/TARGET_STM/TARGET_STM32F4/gpio_irq_device.h

@@ -85,7 +85,7 @@ typedef struct exti_lines {
 } exti_lines_t;
 
 // Used to return the index for channels array.
-static exti_lines_t pin_lines_desc[16] =
+static const exti_lines_t pin_lines_desc[16] =
 {
     // EXTI0
     {.gpio_idx = 0, .irq_index = 0, .irq_n = EXTI0_IRQn}, // pin 0

targets/TARGET_STM/TARGET_STM32F7/gpio_irq_device.h

@@ -85,7 +85,7 @@ typedef struct exti_lines {
 } exti_lines_t;
 
 // Used to return the index for channels array.
-static exti_lines_t pin_lines_desc[16] =
+static const exti_lines_t pin_lines_desc[16] =
 {
     // EXTI0
     {.gpio_idx = 0, .irq_index = 0, .irq_n = EXTI0_IRQn}, // pin 0

targets/TARGET_STM/TARGET_STM32L0/gpio_irq_device.h

@@ -54,7 +54,7 @@ typedef struct exti_lines {
 } exti_lines_t;
 
 // Used to return the index for channels array.
-static exti_lines_t pin_lines_desc[16] =
+static const exti_lines_t pin_lines_desc[16] =
 {
     // EXTI0_1
     {.gpio_idx = 0, .irq_index = 0, .irq_n = EXTI0_1_IRQn}, // pin 0

targets/TARGET_STM/TARGET_STM32L1/gpio_irq_device.h

@@ -58,7 +58,7 @@ typedef struct exti_lines {
 } exti_lines_t;
 
 // Used to return the index for channels array.
-static exti_lines_t pin_lines_desc[16] =
+static const exti_lines_t pin_lines_desc[16] =
 {
     // EXTI0
     {.gpio_idx = 0, .irq_index = 0, .irq_n = EXTI0_IRQn}, // pin 0

targets/TARGET_STM/TARGET_STM32L4/gpio_irq_device.h

@@ -58,7 +58,7 @@ typedef struct exti_lines {
 } exti_lines_t;
 
 // Used to return the index for channels array.
-static exti_lines_t pin_lines_desc[16] =
+static const exti_lines_t pin_lines_desc[16] =
 {
     // EXTI0
     {.gpio_idx = 0, .irq_index = 0, .irq_n = EXTI0_IRQn}, // pin 0