Port SDA and SCL symbols

Author: sandeepmistry

variants/arduino_zero/variant.h

@@ -151,6 +151,9 @@ static const uint8_t SCK  = PIN_SPI_SCK ;
 #define PERIPH_WIRE          sercom3
 #define WIRE_IT_HANDLER      SERCOM3_Handler
 
+static const uint8_t SDA = PIN_WIRE_SDA;
+static const uint8_t SCL = PIN_WIRE_SCL;
+
 /*
  * USB
  */

variants/mkr1000/variant.h

@@ -126,6 +126,8 @@ static const uint8_t SCK1  = PIN_SPI1_SCK;
 #define PIN_WIRE_SCL        (12u)
 #define PERIPH_WIRE         sercom0
 #define WIRE_IT_HANDLER     SERCOM0_Handler
+static const uint8_t SDA = PIN_WIRE_SDA;
+static const uint8_t SCL = PIN_WIRE_SCL;
 
 // USB
 // ---