commit cba59972 upstream.

Without this patch, the headset mic will not work on this machine.

BugLink: https://bugs.launchpad.net/bugs/1476987Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>