ALSA: HDA: Add ideapad quirk for two Dell machines

These two Dell machines have been reported working well with
the ideapad model.

BugLink: http://bugs.launchpad.net/bugs/723676


Cc: stable@kernel.org
Tested-by: David Chen <david.chen@canonical.com>
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>