[ALSA] hda: STAC92xx Line In/Mic as output check

This patch checks to see the Line In/Mic port have the ability
to do output before creating the the control switches.
The 92hd71bxx series of codecs has this issue with the port 0xe,
which only allows input.

Signed-off-by: Matthew Ranostay <mranostay@embededalley.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>