[ALSA] Revert migration to alc_set_pin_output() in alc861_auto_set_output_and_unmute()

Change done by:
        commit f6c7e546
        [ALSA] hda-codec - Fix auto-configuration of Realtek codecs
broke sound on ALC861 Analog.

Signed-off-by: Jacek Luczak <luczak.jacek@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>