arm64: dts: r8a7795: salvator-xs: Connect DU dot clocks 0 and 3

The DU dot clocks 0 and 3 are provided by the programmable VC6 clock
generator. Connect them to the clock source 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/arm64/boot/dts/renesas/r8a7795-salvator-xs.dts

@@ -44,10 +44,12 @@ &du {
 		 <&cpg CPG_MOD 722>,
 		 <&cpg CPG_MOD 721>,
 		 <&cpg CPG_MOD 727>,
+		 <&versaclock6 1>,
 		 <&x21_clk>,
-		 <&x22_clk>;
+		 <&x22_clk>,
+		 <&versaclock6 2>;
 	clock-names = "du.0", "du.1", "du.2", "du.3", "lvds.0",
-		      "dclkin.1", "dclkin.2";
+		      "dclkin.0", "dclkin.1", "dclkin.2", "dclkin.3";
 };
 
 &ehci2 {