[ALSA] Allow shared IRQ for CS5530 device

CS5530 is a PCI device and often shares the IRQ although the SB common
routine tries to allocate it exclusively.  This patch allows shared IRQ
for CS5530.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

sound/isa/sb/sb_common.c

@@ -234,7 +234,9 @@ int snd_sbdsp_create(struct snd_card *card,
 	chip->dma16 = -1;
 	chip->port = port;
 	
-	if (request_irq(irq, irq_handler, hardware == SB_HW_ALS4000 ?
+	if (request_irq(irq, irq_handler,
+			(hardware == SB_HW_ALS4000 ||
+			 hardware == SB_HW_CS5530) ?
 			IRQF_SHARED : IRQF_DISABLED,
 			"SoundBlaster", (void *) chip)) {
 		snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq);