ALSA: hda/realtek - Fixed ALC256 headphone no sound

Dell platform, plug headphone or headset, it had a chance to get no
sound from headphone.
Replace depop procedure will solve this issue.

Signed-off-by: Kailang Yang <kailang@realtek.com>
Link: https://lore.kernel.org/bb8e2de30d294dc287944efa0667685a@realtek.com


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