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/arch/arm/dts/sama5d3_lcd.dtsi b/arch/arm/dts/sama5d3_lcd.dtsi
index 14d7c2b..10fb3a9 100644
--- a/arch/arm/dts/sama5d3_lcd.dtsi
+++ b/arch/arm/dts/sama5d3_lcd.dtsi
@@ -14,31 +14,12 @@
 	ahb {
 		apb {
 			hlcdc: hlcdc@f0030000 {
-				compatible = "atmel,sama5d3-hlcdc";
+				compatible = "atmel,at91sam9x5-hlcdc";
 				reg = <0xf0030000 0x2000>;
 				interrupts = <36 IRQ_TYPE_LEVEL_HIGH 0>;
 				clocks = <&lcdc_clk>, <&lcdck>, <&clk32k>;
 				clock-names = "periph_clk","sys_clk", "slow_clk";
 				status = "disabled";
-
-				hlcdc-display-controller {
-					compatible = "atmel,hlcdc-display-controller";
-					#address-cells = <1>;
-					#size-cells = <0>;
-
-					port@0 {
-						#address-cells = <1>;
-						#size-cells = <0>;
-						reg = <0>;
-					};
-				};
-
-				hlcdc_pwm: hlcdc-pwm {
-					compatible = "atmel,hlcdc-pwm";
-					pinctrl-names = "default";
-					pinctrl-0 = <&pinctrl_lcd_pwm>;
-					#pwm-cells = <3>;
-				};
 			};
 
 			pinctrl@fffff200 {