group locking debugging options

Original posting:

	http://lkml.kernel.org/r/20121214184208.D9E5804D@kernel.stglabs.ibm.com



There are quite a few of these, and we want to make sure that
there is one-stop-shopping for lock debugging.

Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>