Add some defaults to target

Enable current sensor and set scale
Default to SBUS RX

src/main/target/IMPULSERCF3/target.h

@@ -88,15 +88,19 @@
 #define MAX7456_RESTORE_CLK     (SPI_CLOCK_FAST)
 
 #define DEFAULT_VOLTAGE_METER_SOURCE VOLTAGE_METER_ADC
+#define DEFAULT_CURRENT_METER_SOURCE CURRENT_METER_ADC
 #define USE_ADC
 #define ADC_INSTANCE            ADC1
 #define CURRENT_METER_ADC_PIN   PA0
 #define RSSI_ADC_PIN            PA1
 #define VBAT_ADC_PIN            PA2
 
+#define CURRENT_METER_SCALE_DEFAULT 275
+
 #define ENABLE_BLACKBOX_LOGGING_ON_SPIFLASH_BY_DEFAULT
 
 #define DEFAULT_RX_FEATURE      FEATURE_RX_SERIAL
+#define SERIALRX_PROVIDER       SERIALRX_SBUS
 #define SERIALRX_UART           SERIAL_PORT_USART2
 
 #define USE_SERIAL_4WAY_BLHELI_INTERFACE