MAINTAINERS: Add LED subsystem co-maintainer

Mark me as a co-maintainer of LED subsystem.
Signed-off-by: NPavel Machek <pavel@ucw.cz>
Signed-off-by: NJacek Anaszewski <j.anaszewski@samsung.com>

MAINTAINERS

@@ -7084,6 +7084,7 @@ F:	drivers/scsi/53c700*
 LED SUBSYSTEM
 M:	Richard Purdie <rpurdie@rpsys.net>
 M:	Jacek Anaszewski <j.anaszewski@samsung.com>
+M:	Pavel Machek <pavel@ucw.cz>
 L:	linux-leds@vger.kernel.org
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds.git
 S:	Maintained