Define SX126X_ANT_SW for the RAK11200 to allow it to function correctly on the RAK19007 base (#4690)

variants/rak11200/variant.h

@@ -70,6 +70,7 @@ static const uint8_t SCK = 33;
 #define LORA_CS SS
 
 #define USE_SX1262
+#define SX126X_ANT_SW WB_IO2
 #define SX126X_CS SS // NSS for SX126X
 #define SX126X_DIO1 LORA_DIO1
 #define SX126X_BUSY LORA_DIO2