drivers/video/backlight/ep93xx_bl.c: remove duplicated header include

module.h is included twice.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ryan Mallon <rmallon@gmail.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>