ASoC: rt5645: Enable internal microphone and JD on ECS EF20

On ECS EF20 series laptops, the internal mic is on DMIC2/IN2P.
And they need the inv_hp_det to make jack detection to work as
exoected.

Signed-off-by: Chris Chiu <chiu@endlessos.org>
Link: https://lore.kernel.org/r/20210111054141.4668-5-chiu@endlessos.org
Signed-off-by: Mark Brown <broonie@kernel.org>