backlight: adp5520: Add blank line after declarations

Fixed the following checkpatch warning.

WARNING: Missing a blank line after declarations

Signed-off-by: Jingoo Han <[e-mail]>
Signed-off-by: Lee Jones <[e-mail]>

drivers/video/backlight/adp5520_bl.c

···
 static int adp5520_bl_update_status(struct backlight_device *bl)
 {
 	int brightness = bl->props.brightness;
+
 	if (bl->props.power != FB_BLANK_UNBLANK)
 		brightness = 0;