arm64: dts: renesas: rzg2: Add reset control properties for display

Add reset control properties to the device nodes for the Display Units
on all supported RZ/G2 SoCs.  Note that on these SoCs, there is only a
single reset for each pair of DU channels.

Join the clocks lines while at it, to increase uniformity.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/20200218133019.22299-5-geert+renesas@glider.be
diff --git a/arch/arm64/boot/dts/renesas/r8a774b1.dtsi b/arch/arm64/boot/dts/renesas/r8a774b1.dtsi
index 93dd10b..3137f73 100644
--- a/arch/arm64/boot/dts/renesas/r8a774b1.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a774b1.dtsi
@@ -2480,10 +2480,11 @@ du: display@feb00000 {
 			interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 270 IRQ_TYPE_LEVEL_HIGH>;
-			clocks = <&cpg CPG_MOD 724>,
-				 <&cpg CPG_MOD 723>,
+			clocks = <&cpg CPG_MOD 724>, <&cpg CPG_MOD 723>,
 				 <&cpg CPG_MOD 721>;
 			clock-names = "du.0", "du.1", "du.3";
+			resets = <&cpg 724>, <&cpg 722>;
+			reset-names = "du.0", "du.3";
 			status = "disabled";
 
 			renesas,vsps = <&vspd0 0>, <&vspd1 0>, <&vspd0 1>;