[ALSA] hda-codec - Fix assignment of PCM devices for Realtek codecs

Fixed the assignment of PCM devices for Realtek codecs.
The secondary analog capture should be statically asigned to the
third device regardless whether SPDIF exists or not.

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