[PATCH] backlight: Fix Kconfig dependency

CONFIG_FB = m and CONFIG_{BACKLIGHT:LCD}_CLASS_DEVICE = y is possible
resulting in link errors.  Fix by making backlight and lcd class also depend
on FB

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/video/backlight/Kconfig

@@ -10,7 +10,7 @@ menuconfig BACKLIGHT_LCD_SUPPORT
 
 config BACKLIGHT_CLASS_DEVICE
         tristate "Lowlevel Backlight controls"
-	depends on BACKLIGHT_LCD_SUPPORT
+	depends on BACKLIGHT_LCD_SUPPORT && FB
 	default m
 	help
 	  This framework adds support for low-level control of the LCD
@@ -26,7 +26,7 @@ config BACKLIGHT_DEVICE
 
 config LCD_CLASS_DEVICE
         tristate "Lowlevel LCD controls"
-	depends on BACKLIGHT_LCD_SUPPORT
+	depends on BACKLIGHT_LCD_SUPPORT && FB
 	default m
 	help
 	  This framework adds support for low-level control of LCD.