variants: RAK4631: Enable RF module reset pin

There is no reason to not use the reset pin as the RAK4630/31 module
has it connected internally.

Signed-off-by: Frieder Schrempf <frieder@fris.de>

Author: fschrempf

variants/rak4631/RAK4631Board.h

@@ -7,7 +7,7 @@
 // LoRa radio module pins for RAK4631
 #define  P_LORA_DIO_1   47
 #define  P_LORA_NSS     42
-#define  P_LORA_RESET  RADIOLIB_NC   // 38
+#define P_LORA_RESET               38
 #define  P_LORA_BUSY    46
 #define  P_LORA_SCLK    43
 #define  P_LORA_MISO    45