[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/intel8x0.c b/sound/pci/intel8x0.c
index d16ef52..68d0ed0 100644
--- a/sound/pci/intel8x0.c
+++ b/sound/pci/intel8x0.c
@@ -89,7 +89,7 @@
 
 /* just for backward compatibility */
 static int enable;
-module_param(enable, int, 0444);
+module_param(enable, bool, 0444);
 static int joystick;
 module_param(joystick, int, 0444);