ARM: imx_v6_v7_defconfig: Select CONFIG_FB_MXS

CONFIG_FB_MXS is the LCD driver for mx6solo-lite and mx6solox.

Enable it by default.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

arch/arm/configs/imx_v6_v7_defconfig

@@ -203,6 +203,7 @@ CONFIG_DRM_PANEL_SIMPLE=y
 CONFIG_LCD_CLASS_DEVICE=y
 CONFIG_LCD_L4F00242T03=y
 CONFIG_LCD_PLATFORM=y
+CONFIG_FB_MXS=y
 CONFIG_BACKLIGHT_PWM=y
 CONFIG_BACKLIGHT_GPIO=y
 CONFIG_FRAMEBUFFER_CONSOLE=y