Addressed review comments: fixed unmapped switches and added Hexiware buttons

targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_MCU_K64F/TARGET_HEXIWEAR/PinNames.h

@@ -201,6 +201,11 @@ typedef enum {
     LED3 = LED_BLUE,
     LED4 = LED_RED,
 
+    // Standardized button names
+    BUTTON1 = PTA12,
+    BUTTON2 = PTA13,
+    BUTTON3 = PTA15,
+
     // USB Pins
     USBTX = PTB17,
     USBRX = PTB16,

targets/TARGET_Maxim/TARGET_MAX32620/TARGET_MAX32620HSP/PinNames.h

@@ -128,8 +128,6 @@ typedef enum {
     SW3 = NOT_CONNECTED,
     // Standardized button names
     BUTTON1 = SW1,
-    BUTTON2 = SW2,
-    BUTTON3 = SW3,
 
     // USB bridge connected UART pins
     USBTX = P0_1,

targets/TARGET_Maxim/TARGET_MAX32630/TARGET_MAX32630FTHR/PinNames.h

@@ -81,8 +81,6 @@ typedef enum {
     SW3 = NOT_CONNECTED,
     // Standardized button names
     BUTTON1 = SW1,
-    BUTTON2 = SW2,
-    BUTTON3 = SW3,
 
     // USB bridge connected UART pins
     USBTX = P2_1,

targets/TARGET_ONSEMI/TARGET_NCS36510/PinNames.h

@@ -128,10 +128,15 @@ typedef enum {
     LED_YELLOW  = GPIO6,
     LED_BLUE    = GPIO5,
     USER_BUTTON = GPIO7,  /*NEW connection on NCS36510-RF Rev 1.1 - Alias of SW1 */
-    // Standardized button names
+
-    BUTTON1 = USER_BUTTON,
     SW1 = GPIO7,  /*NEW connection on NCS36510-RF Rev 1.1 */
     SW2 = GPIO10,   /*NEW connection on NCS36510-RF Rev 1.1 */
+
+    // Standardized button names
+    BUTTON1 = USER_BUTTON,
+    BUTTON2 = SW1,
+    BUTTON3 = SW2,
+
     SERIAL_TX   = GPIO0,
     SERIAL_RX   = GPIO1,
     USBTX       = GPIO0,

targets/TARGET_STM/TARGET_STM32L4/TARGET_STM32L476xG/TARGET_DISCO_L476VG/PinNames.h

@@ -144,6 +144,11 @@ typedef enum {
     USER_BUTTON = JOYSTICK_CENTER,
     // Standardized button names
     BUTTON1 = USER_BUTTON,
+    BUTTON2 = JOYSTICK_LEFT,
+    BUTTON3 = JOYSTICK_RIGH,
+    BUTTON4 = JOYSTICK_UP, 
+    BUTTON5 = JOYSTICK_DOWN,
+
     SERIAL_TX = PD_5,
     SERIAL_RX = PD_6,
     USBTX = PD_5,