this fixes typo in wm9712 codec which prevents it from registering all audio
routes (and thus working correctly). Please consider applying.

(Tested and works on palmtx, palmld and palmt5)
Signed-off-by: NMarek Vasut <marek.vasut@gmail.com>
Acked-by: NMark Brown <brooie@opensource.wolfsonmicro.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>