arm64: dts: renesas: r8a77990: ebisu: Enable LVDS1 encoder

The LVDS1 encoder must supply a pixel clock to the DU for the DPAD
output when the LVDS0 encoder is used. Enable it despite its output not
being connected.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm64/boot/dts/renesas/r8a77990-ebisu.dts

@@ -467,6 +467,13 @@ lvds0_out: endpoint {
 };
 
 &lvds1 {
+	/*
+	 * Even though the LVDS1 output is not connected, the encoder must be
+	 * enabled to supply a pixel clock to the DU for the DPAD output when
+	 * LVDS0 is in use.
+	 */
+	status = "okay";
+
 	clocks = <&cpg CPG_MOD 727>,
 		 <&x13_clk>,
 		 <&extal_clk>;