Hi folks, this is version 4 of my APUv2/APUv3 series. changes in v4: * fixed spinlocks (using own field instead of gc.bgpio_lock) * dropped superflous dependency on GPIO_GENERIC * initialize gc.base = -1 * added Reviewed-By tags changes in v3: * gpio driver * drop unncessary gpio id checks * cleanup amd_fch_gpio_set() * move iores outside probe() * shorter NULL checks and correct error in probe() * apu board driver * drop unneeded init.h * drop unnecessary comments * clean up logging * dont need to depend on KEYBOARD_GPIO --mtx
