[ALSA] Remove IRQF_DISABLED for shared PCI irqs

Fix IRQ flags for PCI devices.
The shared IRQs for PCI devices shouldn't be allocated with
IRQF_DISABLED.  Also, when MSI is enabled, IRQF_SHARED shouldn't
be used.
The patch removes unnecessary cast in request_irq and free_irq,
too.

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

sound/isa/sb/sb_common.c

@@ -232,7 +232,7 @@ int snd_sbdsp_create(struct snd_card *card,
 	chip->port = port;
 	
 	if (request_irq(irq, irq_handler, hardware == SB_HW_ALS4000 ?
-			IRQF_DISABLED | IRQF_SHARED : IRQF_DISABLED,
+			IRQF_SHARED : IRQF_DISABLED,
 			"SoundBlaster", (void *) chip)) {
 		snd_printk(KERN_ERR "sb: can't grab irq %d\n", irq);
 		snd_sbdsp_free(chip);