[ALSA] sound: ali5451.c fix shadowed variable warnings

enable is used to test for whether or not spdif should be enabled,
change to spdif_enable.

sound/pci/ali5451/ali5451.c:1812:15: warning: symbol 'enable' shadows an earlier one
sound/pci/ali5451/ali5451.c:63:12: originally declared here
sound/pci/ali5451/ali5451.c:1840:27: warning: symbol 'enable' shadows an earlier one
sound/pci/ali5451/ali5451.c:63:12: originally declared here
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/ali5451/ali5451.c

@@ -1809,26 +1809,26 @@ static int snd_ali5451_spdif_get(struct snd_kcontrol *kcontrol,
 				 struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_ali *codec = kcontrol->private_data;
-	unsigned int enable;
+	unsigned int spdif_enable;
 
-	enable = ucontrol->value.integer.value[0] ? 1 : 0;
+	spdif_enable = ucontrol->value.integer.value[0] ? 1 : 0;
 
 	spin_lock_irq(&codec->reg_lock);
 	switch (kcontrol->private_value) {
 	case 0:
-		enable = (codec->spdif_mask & 0x02) ? 1 : 0;
+		spdif_enable = (codec->spdif_mask & 0x02) ? 1 : 0;
 		break;
 	case 1:
-		enable = ((codec->spdif_mask & 0x02) &&
+		spdif_enable = ((codec->spdif_mask & 0x02) &&
 			  (codec->spdif_mask & 0x04)) ? 1 : 0;
 		break;
 	case 2:
-		enable = (codec->spdif_mask & 0x01) ? 1 : 0;
+		spdif_enable = (codec->spdif_mask & 0x01) ? 1 : 0;
 		break;
 	default:
 		break;
 	}
-	ucontrol->value.integer.value[0] = enable;
+	ucontrol->value.integer.value[0] = spdif_enable;
 	spin_unlock_irq(&codec->reg_lock);
 	return 0;
 }
@@ -1837,17 +1837,17 @@ static int snd_ali5451_spdif_put(struct snd_kcontrol *kcontrol,
 				 struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_ali *codec = kcontrol->private_data;
-	unsigned int change = 0, enable = 0;
+	unsigned int change = 0, spdif_enable = 0;
 
-	enable = ucontrol->value.integer.value[0] ? 1 : 0;
+	spdif_enable = ucontrol->value.integer.value[0] ? 1 : 0;
 
 	spin_lock_irq(&codec->reg_lock);
 	switch (kcontrol->private_value) {
 	case 0:
 		change = (codec->spdif_mask & 0x02) ? 1 : 0;
-		change = change ^ enable;
+		change = change ^ spdif_enable;
 		if (change) {
-			if (enable) {
+			if (spdif_enable) {
 				codec->spdif_mask |= 0x02;
 				snd_ali_enable_spdif_out(codec);
 			} else {
@@ -1859,9 +1859,9 @@ static int snd_ali5451_spdif_put(struct snd_kcontrol *kcontrol,
 		break;
 	case 1: 
 		change = (codec->spdif_mask & 0x04) ? 1 : 0;
-		change = change ^ enable;
+		change = change ^ spdif_enable;
 		if (change && (codec->spdif_mask & 0x02)) {
-			if (enable) {
+			if (spdif_enable) {
 				codec->spdif_mask |= 0x04;
 				snd_ali_enable_spdif_chnout(codec);
 			} else {
@@ -1872,9 +1872,9 @@ static int snd_ali5451_spdif_put(struct snd_kcontrol *kcontrol,
 		break;
 	case 2:
 		change = (codec->spdif_mask & 0x01) ? 1 : 0;
-		change = change ^ enable;
+		change = change ^ spdif_enable;
 		if (change) {
-			if (enable) {
+			if (spdif_enable) {
 				codec->spdif_mask |= 0x01;
 				snd_ali_enable_spdif_in(codec);
 			} else {