ALSA: hda - fix broken automute/autoswitch for Realtek

The recent addition of volume-knob widget in the auto-parser broke
automute/autoswitch for some Realtek devices.
Signed-off-by: NDavid Henningsson <david.henningsson@canonical.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_realtek.c

@@ -686,7 +686,7 @@ static void alc_sku_unsol_event(struct hda_codec *codec, unsigned int res)
 	else
 		res >>= 26;
 	action = snd_hda_jack_get_action(codec, res);
-	if (res == ALC_DCVOL_EVENT) {
+	if (action == ALC_DCVOL_EVENT) {
 		/* Execute the dc-vol event here as it requires the NID
 		 * but we don't pass NID to alc_exec_unsol_event().
 		 * Once when we convert all static quirks to the auto-parser,