[ALSA] hda-codec - Implement auto-mic jack sensing on Samsung laptops

Implemented the auto-mic jack sensing for Samsung laptops with AD1986A
codec chip (model=laptop-eapd).

The hardware uses pin 0x1d and 0x1f for the internal and external
mics, respectively.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
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