maple: fix Error in kernel-doc notation

Fix kernel-doc error in maple (it's not kernel-doc):

  Error(drivers/sh/maple/maple.c:782): cannot understand prototype: 'struct bus_type maple_bus_type = '
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/sh/maple/maple.c

@@ -776,7 +776,7 @@ static struct maple_driver maple_unsupported_device = {
 		.bus = &maple_bus_type,
 	},
 };
-/**
+/*
  * maple_bus_type - core maple bus structure
  */
 struct bus_type maple_bus_type = {