Convert CONFIG_ATMEL_LCD et al to Kconfig

This converts the following to Kconfig:
   CONFIG_ATMEL_LCD
   CONFIG_ATMEL_LCD_BGR555
   CONFIG_ATMEL_LCD_RGB565
   CONFIG_GURNARD_SPLASH

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/at91sam9261ek_dataflash_cs0_defconfig b/configs/at91sam9261ek_dataflash_cs0_defconfig
index 3b30a02..5788b9d 100644
--- a/configs/at91sam9261ek_dataflash_cs0_defconfig
+++ b/configs/at91sam9261ek_dataflash_cs0_defconfig
@@ -64,3 +64,4 @@
 CONFIG_TIMER=y
 CONFIG_ATMEL_PIT_TIMER=y
 CONFIG_USB=y
+CONFIG_ATMEL_LCD_BGR555=y