I2C slave support for PyGamer M4

Author: JordanMajd

variants/pygamer_m4/variant.h

@@ -176,6 +176,10 @@ static const uint8_t SCK1 = PIN_SPI1_SCK ;
 #define PIN_WIRE_SCL         (27u)
 #define PERIPH_WIRE          sercom2
 #define WIRE_IT_HANDLER      SERCOM2_Handler
+#define WIRE_IT_HANDLER_0    SERCOM2_0_Handler
+#define WIRE_IT_HANDLER_1    SERCOM2_1_Handler
+#define WIRE_IT_HANDLER_2    SERCOM2_2_Handler
+#define WIRE_IT_HANDLER_3    SERCOM2_3_Handler
 
 static const uint8_t SDA = PIN_WIRE_SDA;
 static const uint8_t SCL = PIN_WIRE_SCL;