ALSA: use KBUILD_MODNAME for request_irq argument in sound/pci/*

The name argument of request_irq() appears in /proc/interrupts, and
it's quite ugly when the name entry contains a space or special letters.
In general, it's simpler and more readable when the module name appears
there, so let's replace all entries with KBUILD_MODNAME.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/pcxhr/pcxhr.c b/sound/pci/pcxhr/pcxhr.c
index cb215a0..046578d 100644
--- a/sound/pci/pcxhr/pcxhr.c
+++ b/sound/pci/pcxhr/pcxhr.c
@@ -1501,7 +1501,7 @@
 	mgr->irq = -1;
 
 	if (request_irq(pci->irq, pcxhr_interrupt, IRQF_SHARED,
-			card_name, mgr)) {
+			KBUILD_MODNAME, mgr)) {
 		snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
 		pcxhr_free(mgr);
 		return -EBUSY;