ALSA: hda/realtek - update ALC225 depop optimize

Add ALC225 its own depop functions for alc_init and alc_shutup.
Add depop optimize step for headset mode functions.

Signed-off-by: Kailang Yang <kailang@realtek.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>