Fix DAC for F103RF and RG (stm32duino#1040)

* Enable DAC for F103RF and RG

Author: MCUdude

variants/Generic_F103Rx/variant.h

@@ -119,15 +119,15 @@ extern "C" {
 // Define here Serial instance number to map on Serial generic name
 #define SERIAL_UART_INSTANCE    1
 
-/* Extra HAL modules */
-#ifdef STM32F103xE
-#define HAL_DAC_MODULE_ENABLED
-#endif
-
 // Default pin used for 'Serial1' instance
 #define PIN_SERIAL_RX           PA10
 #define PIN_SERIAL_TX           PA9
 
+/* Extra HAL modules */
+#if defined(STM32F103xE) || defined(STM32F103xG)
+#define HAL_DAC_MODULE_ENABLED
+#endif
+
 #ifdef __cplusplus
 } // extern "C"
 #endif