[MTS_DRAGONFLY_F411RE] correct serial signal pin names & add wakeup pin name

Author: mfiore02

libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F4/TARGET_MTS_DRAGONFLY_F411RE/PinNames.h

@@ -155,12 +155,12 @@ typedef enum {
     LED4        = D3,
     SERIAL_TX   = D1,
     SERIAL_RX   = D0,
-    SERIAL_RTS  = A1,
-    SERIAL_CTS  = A0,
-    SERIAL_DCD  = D5,
-    SERIAL_DSR  = D8,
-    SERIAL_DTR  = D4,
-    SERIAL_RI   = D9,
+    SERIAL_RTS  = D3,
+    SERIAL_CTS  = D6,
+    SERIAL_DCD  = D4,
+    SERIAL_DSR  = D5,
+    SERIAL_DTR  = D7,
+    SERIAL_RI   = D8,
     USBTX       = PB_6,
     USBRX       = PB_7,
     RADIO_TX    = PC_7,
@@ -171,6 +171,7 @@ typedef enum {
     RADIO_DSR   = D8,
     RADIO_DTR   = D4,
     RADIO_RI    = D9,
+    WAKEUP      = D3,
 
     // I2C1 and I2C3 are available on Arduino pins
     I2C1_SCL    = D15,