ALSA: hda/ca0132 - Add ZxR input/output select commands

This patch adds commands for selecting input and output on the Sound
Blaster ZxR. The ZxR has no front panel header, and has line-in on the
separate daughter board, so it only does rear-mic.

Signed-off-by: Connor McAdams <conmanx360@gmail.com>
Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>