[ALSA] hda-codec - Add more Dell systems

This patch adds support for Dell E520 and a couple of other 965 based systems.

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>