Some devices don't use the builtin jack-detect but can still benefit
from the mic-bias-current over-current-detection headphones vs
headset detection done by rt5640_detect_headset().

In this case the jack-inserted check done by rt5640_detect_headset()
needs to be done through a GPIO rather then by using the codec's
builtin jack-detect. Add an optional hp_det_gpio parameter and export
rt5640_detect_headset() for use on machines where jack-detect is
handled outside of the codec.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210819190543.784415-4-hdegoede@redhat.comSigned-off-by: Mark Brown <broonie@kernel.org>