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/pm9261_defconfig b/configs/pm9261_defconfig
index 7a640ff..bda9917 100644
--- a/configs/pm9261_defconfig
+++ b/configs/pm9261_defconfig
@@ -60,5 +60,7 @@
 CONFIG_USB=y
 CONFIG_DM_VIDEO=y
 # CONFIG_VIDEO_BPP32 is not set
+CONFIG_ATMEL_LCD=y
+CONFIG_ATMEL_LCD_BGR555=y
 CONFIG_LCD=y
 CONFIG_REGEX=y