ALSA: hda - Add stereo-dmic fixup for Acer Aspire One 522

Acer Aspire One 522 has the infamous digital mic unit that needs the
phase inversion fixup for stereo.

Bugzilla: https://bugzilla.novell.com/show_bug.cgi?id=715737



Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>