Add handling of Intel-iMac-specific pinconfig of the sound card.
Intel-iMac now handled as a separated subsystem.
Signed-off-by: NSylvain FORET <sylvain.foret@anu.edu.au>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>