ALSA: hda - Create output controls according to pin types for IDT/STAC

Improve the parser to pick up more intuitive control names for the
outputs judging from the pin type, instead of fixed names assigned
to channels.

Also, revive the multi-HP workaround since this change fixes the
problem with the multi-HP detection.

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