Fix ORQAF7 - gate GHST RX protocol (betaflight#598)

* Fix ORQAF7 - remove RX protocol

* Board has SPI GHST receiver

configs/ORQAF7/config.h

@@ -36,6 +36,10 @@
 #define USE_FLASH_W25Q128FV
 #define USE_MAX7456
 
+#ifndef USE_SERIALRX_GHST
+#define USE_SERIALRX_GHST
+#endif
+
 #define BEEPER_PIN           PA4
 #define MOTOR1_PIN           PC8  
 #define MOTOR2_PIN           PC9
@@ -104,19 +108,16 @@
     TIMER_PIN_MAP( 4, PA15, 1,  0) \
     TIMER_PIN_MAP( 5, PB3,  1,  0)
 
-#define DEFAULT_VOLTAGE_METER_SCALE 112
-#define DEFAULT_VOLTAGE_METER_DIVIDER 1
+#define DEFAULT_VOLTAGE_METER_SCALE      112
+#define DEFAULT_VOLTAGE_METER_DIVIDER    1
 #define DEFAULT_VOLTAGE_METER_MULTIPLIER 12
-#define DEFAULT_CURRENT_METER_SCALE 108
-#define USE_SERIALRX_GHST
-#define SERIALRX_UART SERIAL_PORT_USART2
-#define GPS_UART SERIAL_PORT_USART6
-#define BARO_I2C_INSTANCE (I2CDEV_1)
-#define MAG_I2C_INSTANCE          (I2CDEV_1)
-#define DEFAULT_BLACKBOX_DEVICE     BLACKBOX_DEVICE_FLASH
-#define DEFAULT_CURRENT_METER_SOURCE CURRENT_METER_ADC
-#define DEFAULT_VOLTAGE_METER_SOURCE VOLTAGE_METER_ADC
+#define DEFAULT_CURRENT_METER_SCALE      108
+#define SERIALRX_UART                    SERIAL_PORT_USART2
+#define GPS_UART                         SERIAL_PORT_USART6
+#define BARO_I2C_INSTANCE                (I2CDEV_1)
+#define MAG_I2C_INSTANCE                 (I2CDEV_1)
+#define DEFAULT_BLACKBOX_DEVICE          BLACKBOX_DEVICE_FLASH
+#define DEFAULT_CURRENT_METER_SOURCE     CURRENT_METER_ADC
+#define DEFAULT_VOLTAGE_METER_SOURCE     VOLTAGE_METER_ADC
 #define USE_BEEPER
-#define SYSTEM_HSE_MHZ 8
-
-
+#define SYSTEM_HSE_MHZ                   8