[ALSA] Add the MCP73/77 support to hda_intel driver

Add the MCP73/MCP77 support to hda driver.
The patch base on kernel 2.6.22-rc4

Signed-off-by: Peer Chen <peerchen@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>