Merge pull request #2009 from MultiTechSystems/mdot-leds-fix

[MTS_MDOT_F411RE] add LED2-LED4 definitions

Author: sg-

hal/targets/hal/TARGET_STM/TARGET_STM32F4/TARGET_MTS_MDOT_F411RE/PinNames.h

@@ -157,6 +157,9 @@ typedef enum {
 
     // needed for mbed to build tests
     LED1        = PA_0,
+    LED2        = PA_0,
+    LED3        = PA_0,
+    LED4        = PA_0,
 
     // XBEE_DOUT/DIN, RS232 port on UDK board
     SERIAL_TX   = PA_2,