expose selected driver in python binding #72

Job	Run time
check_formatting / cpp_linter	11s
build (pico, USE_I2C=ON, USE_SW_DR=ON)	1m 24s
build (pico, USE_I2C=ON, USE_SW_DR=OFF)	1m 7s
build (pico, USE_I2C=OFF, USE_SW_DR=ON)	1m 16s
build (pico, USE_I2C=OFF, USE_SW_DR=OFF)	1m 5s
build (pico_w, USE_I2C=ON, USE_SW_DR=ON)	1m 17s
build (pico_w, USE_I2C=ON, USE_SW_DR=OFF)	1m 9s
build (pico_w, USE_I2C=OFF, USE_SW_DR=ON)	1m 2s
build (pico_w, USE_I2C=OFF, USE_SW_DR=OFF)	1m 1s
build (adafruit_feather_rp2040, USE_I2C=ON, USE_SW_DR=ON)	1m 51s
build (adafruit_feather_rp2040, USE_I2C=ON, USE_SW_DR=OFF)	1m 5s
build (adafruit_feather_rp2040, USE_I2C=OFF, USE_SW_DR=ON)	57s
build (adafruit_feather_rp2040, USE_I2C=OFF, USE_SW_DR=OFF)	1m 14s
build (adafruit_itsybitsy_rp2040, USE_I2C=ON, USE_SW_DR=ON)	1m 10s
build (adafruit_itsybitsy_rp2040, USE_I2C=ON, USE_SW_DR=OFF)	1m 44s
build (adafruit_itsybitsy_rp2040, USE_I2C=OFF, USE_SW_DR=ON)	59s
build (adafruit_itsybitsy_rp2040, USE_I2C=OFF, USE_SW_DR=OFF)	58s
build (adafruit_qtpy_rp2040, USE_I2C=ON, USE_SW_DR=ON)	1m 18s
build (adafruit_qtpy_rp2040, USE_I2C=ON, USE_SW_DR=OFF)	1m 35s
build (adafruit_qtpy_rp2040, USE_I2C=OFF, USE_SW_DR=ON)	1m 21s
build (adafruit_qtpy_rp2040, USE_I2C=OFF, USE_SW_DR=OFF)	1m 24s
	25m 8s

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