[ALSA] Fix the type of enable module option

Fix the type of enable module option to bool.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/atiixp_modem.c b/sound/pci/atiixp_modem.c
index ab39c0b..210eb67 100644
--- a/sound/pci/atiixp_modem.c
+++ b/sound/pci/atiixp_modem.c
@@ -52,7 +52,7 @@
 
 /* just for backward compatibility */
 static int enable;
-module_param(enable, int, 0444);
+module_param(enable, bool, 0444);
 
 
 /*