MAINTAINERS: add backlight co-maintainers

Bryan Wu and Lee Jones volunteer to maintain backlight drivers and help
to setup git-tree for backlight subsystem.  Thus, I add them as
backlight co-maintainers.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Acked-by: NBryan Wu <cooloney@gmail.com>
Acked-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -1704,6 +1704,8 @@ F:	drivers/net/wireless/b43legacy/
 
 BACKLIGHT CLASS/SUBSYSTEM
 M:	Jingoo Han <jg1.han@samsung.com>
+M:	Bryan Wu <cooloney@gmail.com>
+M:	Lee Jones <lee.jones@linaro.org>
 S:	Maintained
 F:	drivers/video/backlight/
 F:	include/linux/backlight.h