menuconfig: transform NLS and DLM menus

Changes NLS and DLM menus into a 'menuconfig' object so that it can be
disabled at once without having to enter the menu first to disable the config
option.

Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>