[ALSA] hda-codec - Output MFG information for HDA devices

This patch output information about the MFG (Modem Function Group) to
the /proc/asound/card?/codec#? file. This information is important to
identify if a HDA device has a modem or not.

Signed-off-by: Jonathan Phenix <jonathan@linuxant.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>