[ALSA] Add dummy obsoleted module options for backward compatibility

Added dummay obsoleted module options for backward compatibility
(to reduce possible bugzilla entries :)

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/intel8x0m.c

@@ -67,6 +67,10 @@ MODULE_PARM_DESC(id, "ID string for Intel i8x0 modemcard.");
 module_param(ac97_clock, int, 0444);
 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (0 = auto-detect).");
 
+/* just for backward compatibility */
+static int enable;
+module_param(enable, int, 0444);
+
 /*
  *  Direct registers
  */