ALSA: hda - Fix alc662_dac_nid and change "6stack-dig" to "5stack-dig"

alc662 series only have 3 DAC, so it can only support 5stack-dig
instead of 6stack-dig.

[updated HD-Audio-Models.txt as well by tiwai]
Signed-off-by: Raymond Yau <superquad.vortex2@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Documentation/sound/alsa/HD-Audio-Models.txt

@@ -94,7 +94,7 @@ ALC662/663/272
   3stack-dig	3-stack (2-channel) with SPDIF
   3stack-6ch	 3-stack (6-channel)
   3stack-6ch-dig 3-stack (6-channel) with SPDIF
-  6stack-dig	 6-stack with SPDIF
+  5stack-dig	 5-stack with SPDIF
   lenovo-101e	 Lenovo laptop
   eeepc-p701	ASUS Eeepc P701
   eeepc-ep20	ASUS Eeepc EP20

sound/pci/hda/patch_realtek.c

@@ -17432,8 +17432,8 @@ static int patch_alc861vd(struct hda_codec *codec)
 #define ALC662_DIGOUT_NID	0x06
 #define ALC662_DIGIN_NID	0x0a
 
-static hda_nid_t alc662_dac_nids[4] = {
-	/* front, rear, clfe, rear_surr */
+static hda_nid_t alc662_dac_nids[3] = {
+	/* front, rear, clfe */
 	0x02, 0x03, 0x04
 };
 
@@ -18691,7 +18691,7 @@ static const char * const alc662_models[ALC662_MODEL_LAST] = {
 	[ALC662_3ST_2ch_DIG]	= "3stack-dig",
 	[ALC662_3ST_6ch_DIG]	= "3stack-6ch-dig",
 	[ALC662_3ST_6ch]	= "3stack-6ch",
-	[ALC662_5ST_DIG]	= "6stack-dig",
+	[ALC662_5ST_DIG]	= "5stack-dig",
 	[ALC662_LENOVO_101E]	= "lenovo-101e",
 	[ALC662_ASUS_EEEPC_P701] = "eeepc-p701",
 	[ALC662_ASUS_EEEPC_EP20] = "eeepc-ep20",