[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>
diff --git a/sound/pci/fm801.c b/sound/pci/fm801.c
index 77e3d5c..b7b361c 100644
--- a/sound/pci/fm801.c
+++ b/sound/pci/fm801.c
@@ -1395,7 +1395,7 @@
 	}
 	chip->port = pci_resource_start(pci, 0);
 	if ((tea575x_tuner & 0x0010) == 0) {
-		if (request_irq(pci->irq, snd_fm801_interrupt, IRQF_DISABLED|IRQF_SHARED,
+		if (request_irq(pci->irq, snd_fm801_interrupt, IRQF_SHARED,
 				"FM801", chip)) {
 			snd_printk(KERN_ERR "unable to grab IRQ %d\n", chip->irq);
 			snd_fm801_free(chip);