ALSA: hda - Add model=6530g option

Add the new model string corresponding to the previous Acer Aspire
6530G support.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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

@@ -139,6 +139,7 @@ ALC883/888
   acer		Acer laptops (Travelmate 3012WTMi, Aspire 5600, etc)
   acer-aspire	Acer Aspire 9810
   acer-aspire-4930g Acer Aspire 4930G
+  acer-aspire-6530g Acer Aspire 6530G
   acer-aspire-8930g Acer Aspire 8930G
   medion	Medion Laptops
   medion-md2	Medion MD2

sound/pci/hda/patch_realtek.c

@@ -9030,6 +9030,7 @@ static const char *alc883_models[ALC883_MODEL_LAST] = {
 	[ALC883_ACER]		= "acer",
 	[ALC883_ACER_ASPIRE]	= "acer-aspire",
 	[ALC888_ACER_ASPIRE_4930G]	= "acer-aspire-4930g",
+	[ALC888_ACER_ASPIRE_6530G]	= "acer-aspire-6530g",
 	[ALC888_ACER_ASPIRE_8930G]	= "acer-aspire-8930g",
 	[ALC883_MEDION]		= "medion",
 	[ALC883_MEDION_MD2]	= "medion-md2",