backlight: lm3639: Don't mix different enum types

backlight: lm3639: Don't mix different enum types

Don't mix different enum types to fix the sparse warnings.

drivers/video/backlight/lm3639_bl.c:80:51: warning: mixing different enum types
drivers/video/backlight/lm3639_bl.c:80:51:     int enum lm3639_fleds  versus
drivers/video/backlight/lm3639_bl.c:80:51:     int enum lm3639_bleds
drivers/video/backlight/lm3639_bl.c:82:51: warning: mixing different enum types
drivers/video/backlight/lm3639_bl.c:82:51:     int enum lm3639_fleds  versus
drivers/video/backlight/lm3639_bl.c:82:51:     int enum lm3639_bleds

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>