ASoC: soc-ops: cleanup cppcheck warning at snd_soc_put_volsw_sx()

This patch cleanups below cppcheck warning.

sound/soc/soc-ops.c:410:30: style: The scope of the variable 'val2' can be reduced. [variableScope]
 unsigned int val, val_mask, val2 = 0;
                             ^
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/874kc7w2a2.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-ops.c

@@ -407,7 +407,7 @@ int snd_soc_put_volsw_sx(struct snd_kcontrol *kcontrol,
 	int min = mc->min;
 	unsigned int mask = (1U << (fls(min + max) - 1)) - 1;
 	int err = 0;
-	unsigned int val, val_mask, val2;
+	unsigned int val, val_mask;
 
 	val_mask = mask << shift;
 	val = (ucontrol->value.integer.value[0] + min) & mask;
@@ -418,6 +418,8 @@ int snd_soc_put_volsw_sx(struct snd_kcontrol *kcontrol,
 		return err;
 
 	if (snd_soc_volsw_is_stereo(mc)) {
+		unsigned int val2;
+
 		val_mask = mask << rshift;
 		val2 = (ucontrol->value.integer.value[1] + min) & mask;
 		val2 = val2 << rshift;