ALSA: hda - Add inverted dmic for Packard Bell DOTS

On the internal mic of the Packard Bell DOTS, one channel
has an inverted signal. Add a quirk to fix this up.

Cc: stable@vger.kernel.org
BugLink: https://bugs.launchpad.net/bugs/1523232
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>