Some laptop has an internal analog microphone that is 'fixed'.
This patch prevents creating a 'Mic In as Output' switch for
ports that can't be outputs.
Signed-off-by: NMatthew Ranostay <mranostay@embeddedalley.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@perex.cz>