[ALSA] hda-codec - Fix number of pin widgets with STAC codecs

Use ARRAY_SIZE() to calculate the number of pin widgets for each codec
chip.
This also fixes a typo in STAC9205 code that gives a wrong number (14
instead of 12), which resulted in fatal communication errors.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>