[ALSA] Fix irq handler in soc/at91/at91rm9200-i2s.c

Fixed the irq handler in soc/at91-at91rm9200-i2s.c to follow the
new style without pt_regs.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

sound/soc/at91/at91rm9200-i2s.c

@@ -270,8 +270,7 @@ static struct at91rm9200_ssc_info {
 };
 
 
-static int at91rm9200_i2s_interrupt(int irq, void *dev_id,
-	struct pt_regs *regs)
+static irqreturn_t at91rm9200_i2s_interrupt(int irq, void *dev_id)
 {
 	struct at91rm9200_ssc_info *ssc_p = dev_id;
 	at91rm9200_pcm_dma_params_t *dma_params;