[ALSA] Suppress irq handler mismatch messages in ALSA ISA drivers

Suppress 'irq handler mismatch' messages at auto-probing of irqs
in ALSA ISA drivers.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

include/sound/initval.h

@@ -62,7 +62,8 @@ static int snd_legacy_find_free_irq(int *irq_table)
 {
 	while (*irq_table != -1) {
 		if (!request_irq(*irq_table, snd_legacy_empty_irq_handler,
-				 SA_INTERRUPT, "ALSA Test IRQ", (void *) irq_table)) {
+				 SA_INTERRUPT | SA_PROBEIRQ, "ALSA Test IRQ",
+				 (void *) irq_table)) {
 			free_irq(*irq_table, (void *) irq_table);
 			return *irq_table;
 		}