expose selected driver in python binding #71

Job	Run time
check_formatting / cpp_linter	9s
build (pico, USE_I2C=ON, USE_SW_DR=ON)	1m 30s
build (pico, USE_I2C=ON, USE_SW_DR=OFF)	1m 24s
build (pico, USE_I2C=OFF, USE_SW_DR=ON)	1m 30s
build (pico, USE_I2C=OFF, USE_SW_DR=OFF)	1m 2s
build (pico_w, USE_I2C=ON, USE_SW_DR=ON)	1m 51s
build (pico_w, USE_I2C=ON, USE_SW_DR=OFF)	1m 23s
build (pico_w, USE_I2C=OFF, USE_SW_DR=ON)	1m 0s
build (pico_w, USE_I2C=OFF, USE_SW_DR=OFF)	1m 5s
build (adafruit_feather_rp2040, USE_I2C=ON, USE_SW_DR=ON)	1m 18s
build (adafruit_feather_rp2040, USE_I2C=ON, USE_SW_DR=OFF)	1m 10s
build (adafruit_feather_rp2040, USE_I2C=OFF, USE_SW_DR=ON)	1m 30s
build (adafruit_feather_rp2040, USE_I2C=OFF, USE_SW_DR=OFF)	1m 43s
build (adafruit_itsybitsy_rp2040, USE_I2C=ON, USE_SW_DR=ON)	1m 15s
build (adafruit_itsybitsy_rp2040, USE_I2C=ON, USE_SW_DR=OFF)	1m 24s
build (adafruit_itsybitsy_rp2040, USE_I2C=OFF, USE_SW_DR=ON)	1m 27s
build (adafruit_itsybitsy_rp2040, USE_I2C=OFF, USE_SW_DR=OFF)	1m 55s
build (adafruit_qtpy_rp2040, USE_I2C=ON, USE_SW_DR=ON)	1m 1s
build (adafruit_qtpy_rp2040, USE_I2C=ON, USE_SW_DR=OFF)	1m 20s
build (adafruit_qtpy_rp2040, USE_I2C=OFF, USE_SW_DR=ON)	1m 15s
build (adafruit_qtpy_rp2040, USE_I2C=OFF, USE_SW_DR=OFF)	1m 23s
	27m 35s

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