ARM: tegra: nexus7: Use panel-lvds as the only panel compatible

Depending on a driver probe order, panel-simple driver may probe first,
which results in this error:

panel-simple display-panel: Reject override mode: panel has a fixed mode

We don't want to use panel-simple anyways because customized timings are
preferred for Nexus 7, hence remove the panel-simple compatibles from the
panel node.

Signed-off-by: Dmitry Osipenko <[e-mail]>
Signed-off-by: Thierry Reding <[e-mail]>

arch/arm/boot/dts/tegra30-asus-nexus7-grouper-common.dtsi

···
 	};
 
 	display-panel {
-		compatible = "hydis,hv070wx2-1e0", "chunghwa,claa070wp03xg",
-			     "panel-lvds";
+		/*
+		 * Nexus 7 supports two compatible panel models:
+		 *
+		 *  1. hydis,hv070wx2-1e0
+		 *  2. chunghwa,claa070wp03xg
+		 *
+		 * We want to use timing which is optimized for Nexus 7,
+		 * hence we need to customize the timing.
+		 */
+		compatible = "panel-lvds";
 
 		power-supply = <&vdd_pnl>;
 		backlight = <&backlight>;