ASoC: fsl: imx-audmix: Fix unused assignment to variable 'ret'

Omit unused initialized value, because 'ret' will be assigined
by the function snd_soc_component_read().

Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Link: https://lore.kernel.org/r/20200513111408.11452-1-tangbin@cmss.chinamobile.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/fsl_audmix.c

@@ -116,7 +116,7 @@ static int fsl_audmix_put_mix_clk_src(struct snd_kcontrol *kcontrol,
 	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
 	unsigned int *item = ucontrol->value.enumerated.item;
 	unsigned int reg_val, val, mix_clk;
-	int ret = 0;
+	int ret;
 
 	/* Get current state */
 	ret = snd_soc_component_read(comp, FSL_AUDMIX_CTR, &reg_val);
@@ -159,7 +159,7 @@ static int fsl_audmix_put_out_src(struct snd_kcontrol *kcontrol,
 	unsigned int *item = ucontrol->value.enumerated.item;
 	u32 out_src, mix_clk;
 	unsigned int reg_val, val, mask = 0, ctr = 0;
-	int ret = 0;
+	int ret;
 
 	/* Get current state */
 	ret = snd_soc_component_read(comp, FSL_AUDMIX_CTR, &reg_val);