ALSA: HDA: Add quirk for Lenovo U350

commit d2859fd4 upstream.

Add model=asus quirk for Lenovo Ideapad U350 to make internal mic
work correctly.

BugLink: http://bugs.launchpad.net/bugs/751681


Reported-by: Kent Baxley <kent.baxley@canonical.com>
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>