PCA9554 driver
Implement a driver for the PCA9554 which is used in the new Sensorring. Also add a new BOARD_SENSORRING tag for the new Sensorring in the AMiRo-OS.
Hint: Flash the PowerManagement over
make flash_PowerManagement_1-2 BOARD_SENSORRING=BOARD_TOFPROX_SENSOR
Edited by Svenja Kenneweg