ASoC: fsl_mqs: remove set but not used variable 'bclk'

Fixes gcc '-Wunused-but-set-variable' warning:

sound/soc/fsl/fsl_mqs.c: In function fsl_mqs_hw_params:
sound/soc/fsl/fsl_mqs.c:54:6: warning: variable bclk set but not used [-Wunused-but-set-variable]

It is never used, so can be removed.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20191006105522.58560-1-yuehaibing@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/fsl_mqs.c

@@ -51,10 +51,9 @@ static int fsl_mqs_hw_params(struct snd_pcm_substream *substream,
 	struct fsl_mqs *mqs_priv = snd_soc_component_get_drvdata(component);
 	unsigned long mclk_rate;
 	int div, res;
-	int bclk, lrclk;
+	int lrclk;
 
 	mclk_rate = clk_get_rate(mqs_priv->mclk);
-	bclk = snd_soc_params_to_bclk(params);
 	lrclk = params_rate(params);
 
 	/*