Small fix on BME280 Config & CC1101-TXPower Throttle (#1382)

* https://github.com/1technophile/OpenMQTTGateway/issues/1380
CC1101 TXPower selection

* Creates the possability the define SDA/SCL Pins correct through a compiler switch from the platformio.ini
Sample:
  '-DBME280_PIN_SDA=0'
  '-DBME280_PIN_SCL=2'

main/config_BME280.h

@@ -58,8 +58,12 @@ unsigned long timebme280 = 0;
 int BME280_i2c_addr = 0x76; // Bosch BME280 I2C Address
 
 // Only supported for ESP
-int BME280_PIN_SDA = SDA; // PIN SDA
-int BME280_PIN_SCL = SCL; // PIN SCL
+#ifndef BME280_PIN_SDA
+#  define BME280_PIN_SDA SDA
+#endif
+#ifndef BME280_PIN_SCL
+#  define BME280_PIN_SCL SCL
+#endif
 
 // Oversampling for BME280/BMP280 devices