ARM: dts: rockchip: Kill off "simple-panel" compatibles

"simple-panel" is a Linux driver and has never been an accepted upstream
compatible string, so remove it.

Cc: Heiko Stuebner <heiko@sntech.de>
Cc: linux-rockchip@lists.infradead.org
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200117230851.25434-1-robh@kernel.org
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3288-evb.dtsi

@@ -97,7 +97,7 @@
 	};
 
 	panel: panel {
-		compatible = "lg,lp079qx1-sp0v", "simple-panel";
+		compatible = "lg,lp079qx1-sp0v";
 		backlight = <&backlight>;
 		enable-gpios = <&gpio7 RK_PA4 GPIO_ACTIVE_HIGH>;
 		pinctrl-0 = <&lcd_cs>;

arch/arm/boot/dts/rk3288-veyron-edp.dtsi

@@ -54,7 +54,7 @@
 	};
 
 	panel: panel {
-		compatible = "innolux,n116bge", "simple-panel";
+		compatible = "innolux,n116bge";
 		status = "okay";
 		power-supply = <&panel_regulator>;
 		backlight = <&backlight>;

arch/arm/boot/dts/rk3288-veyron-minnie.dts

@@ -71,7 +71,7 @@
 };
 
 &panel {
-	compatible = "auo,b101ean01", "simple-panel";
+	compatible = "auo,b101ean01";
 
 	/delete-node/ panel-timing;
 

arch/arm/boot/dts/rk3288-veyron-tiger.dts

@@ -53,7 +53,7 @@
 };
 
 &panel {
-	compatible = "auo,b101ean01", "simple-panel";
+	compatible = "auo,b101ean01";
 
 	/delete-node/ panel-timing;