board: sama5d3xek: Convert to CONFIG_DM_VIDEO

Convert the board to support the video driver model, add the device
tree node, and remove the unnecessary code.

Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/sama5d36ek_cmp_spiflash_defconfig b/configs/sama5d36ek_cmp_spiflash_defconfig
index e29e3a8..1c004ef 100644
--- a/configs/sama5d36ek_cmp_spiflash_defconfig
+++ b/configs/sama5d36ek_cmp_spiflash_defconfig
@@ -55,5 +55,6 @@
 CONFIG_ATMEL_SPI=y
 CONFIG_TIMER=y
 CONFIG_ATMEL_PIT_TIMER=y
-CONFIG_LCD=y
+CONFIG_DM_VIDEO=y
+CONFIG_ATMEL_HLCD=y
 CONFIG_FAT_WRITE=y