ASoC: Intel: kbl_rt5660: rename shadowed variable

Fix cppcheck warning:

[sound/soc/intel/boards/kbl_rt5660.c:282] ->
[sound/soc/intel/boards/kbl_rt5660.c:141]: (style) Local variable
'channels' shadows outer variable
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200113210428.27457-10-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/kbl_rt5660.c

@@ -138,13 +138,13 @@ static int kabylake_ssp0_fixup(struct snd_soc_pcm_runtime *rtd,
 {
 	struct snd_interval *rate = hw_param_interval(params,
 			SNDRV_PCM_HW_PARAM_RATE);
-	struct snd_interval *channels = hw_param_interval(params,
+	struct snd_interval *chan = hw_param_interval(params,
 			SNDRV_PCM_HW_PARAM_CHANNELS);
 	struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 
 	/* The ADSP will convert the FE rate to 48k, stereo */
 	rate->min = rate->max = 48000;
-	channels->min = channels->max = DUAL_CHANNEL;
+	chan->min = chan->max = DUAL_CHANNEL;
 
 	/* set SSP0 to 24 bit */
 	snd_mask_none(fmt);