[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/intel8x0m.c b/sound/pci/intel8x0m.c
index 314f3d8..42601f0 100644
--- a/sound/pci/intel8x0m.c
+++ b/sound/pci/intel8x0m.c
@@ -69,7 +69,7 @@
 
 /* just for backward compatibility */
 static int enable;
-module_param(enable, int, 0444);
+module_param(enable, bool, 0444);
 
 /*
  *  Direct registers