ASoC: mediatek: mt8173: rename local irq variable

cppcheck warning:

sound/soc/mediatek/mt8173/mt8173-afe-pcm.c:929:28: style: Local
variable 'irq' shadows outer argument [shadowArgument]
  struct mtk_base_afe_irq *irq;
                           ^
sound/soc/mediatek/mt8173/mt8173-afe-pcm.c:914:47: note: Shadowed
declaration
static irqreturn_t mt8173_afe_irq_handler(int irq, void *dev_id)
                                              ^
sound/soc/mediatek/mt8173/mt8173-afe-pcm.c:929:28: note: Shadow
variable
  struct mtk_base_afe_irq *irq;
                           ^

Not a great idea to have two 'irq' variables in the same function...
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210311004904.121205-5-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/mediatek/mt8173/mt8173-afe-pcm.c

@@ -926,14 +926,14 @@ static irqreturn_t mt8173_afe_irq_handler(int irq, void *dev_id)
 
 	for (i = 0; i < MT8173_AFE_MEMIF_NUM; i++) {
 		struct mtk_base_afe_memif *memif = &afe->memif[i];
-		struct mtk_base_afe_irq *irq;
+		struct mtk_base_afe_irq *irq_p;
 
 		if (memif->irq_usage < 0)
 			continue;
 
-		irq = &afe->irqs[memif->irq_usage];
+		irq_p = &afe->irqs[memif->irq_usage];
 
-		if (!(reg_value & (1 << irq->irq_data->irq_clr_shift)))
+		if (!(reg_value & (1 << irq_p->irq_data->irq_clr_shift)))
 			continue;
 
 		snd_pcm_period_elapsed(memif->substream);