[ALSA] sound: patch_sigmatel.c fix shadowed variable warning

Temp variable in the loop shadows the second argument (which is otherwise
unused in this function).  Change this to defcfg as it is used to hold
the default config.
sound/pci/hda/patch_sigmatel.c:2759:18: warning: symbol 'cfg' shadows an earlier one
sound/pci/hda/patch_sigmatel.c:2734:26: originally declared here
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_sigmatel.c

@@ -2849,11 +2849,11 @@ static int stac9200_auto_create_lfe_ctls(struct hda_codec *codec,
 	if (lfe_pin == 0 && spec->autocfg.speaker_outs == 0) {
 		for (i = 0; i < spec->autocfg.line_outs && lfe_pin == 0x0; i++) {
 			hda_nid_t pin = spec->autocfg.line_out_pins[i];
-			unsigned long cfg;
-			cfg = snd_hda_codec_read(codec, pin, 0,
+			unsigned long defcfg;
+			defcfg = snd_hda_codec_read(codec, pin, 0,
 						 AC_VERB_GET_CONFIG_DEFAULT,
 						 0x00);
-			if (get_defcfg_device(cfg) == AC_JACK_SPEAKER) {
+			if (get_defcfg_device(defcfg) == AC_JACK_SPEAKER) {
 				unsigned long wcaps = get_wcaps(codec, pin);
 				wcaps &= (AC_WCAP_STEREO | AC_WCAP_OUT_AMP);
 				if (wcaps == AC_WCAP_OUT_AMP)