ALSA: hda - VIA: Add missing support for VT1718S in A-A path

commit ab657e0c upstream.

Modify mute_aa_path() function to support VT1718S codec.

Signed-off-by: Lydia Wang <lydiawang@viatech.com.cn>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>