[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/pcxhr/pcxhr.c b/sound/pci/pcxhr/pcxhr.c
index 533c672..d974134 100644
--- a/sound/pci/pcxhr/pcxhr.c
+++ b/sound/pci/pcxhr/pcxhr.c
@@ -1250,7 +1250,7 @@
 	mgr->pci = pci;
 	mgr->irq = -1;
 
-	if (request_irq(pci->irq, pcxhr_interrupt, IRQF_DISABLED|IRQF_SHARED,
+	if (request_irq(pci->irq, pcxhr_interrupt, IRQF_SHARED,
 			card_name, mgr)) {
 		snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
 		pcxhr_free(mgr);