[ALSA] hda-codec - Add support for Medion laptops

This patch adds audio support for Medion's line of laptops,
based on code shipped with the laptops.  Microphone support is
still being explored.

Signed-off-by: Tobin Davis <tdavis@dsl-only.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>