ARM: dts: r8a7779: Fix DU reg property

The system uses one address cell and one size cell, not two. Fix the DU
DT node.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7779.dtsi

@@ -420,7 +420,7 @@ hspi2: spi@fffc6000 {
 
 	du: display@fff80000 {
 		compatible = "renesas,du-r8a7779";
-		reg = <0 0xfff80000 0 0x40000>;
+		reg = <0xfff80000 0x40000>;
 		interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp1_clks R8A7779_CLK_DU>;
 		power-domains = <&sysc R8A7779_PD_ALWAYS_ON>;