ARM: sunxi: dt: Change the touchscreen compatibles

Switch the device tree touchscreen compatibles to have a common pattern accross
all Allwinner SoCs. Since the touchscreen driver has not been merged yet, it
has no side effect.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun4i-a10.dtsi

@@ -426,7 +426,7 @@ sid: eeprom@01c23800 {
 		};
 
 		rtp: rtp@01c25000 {
-			compatible = "allwinner,sun4i-ts";
+			compatible = "allwinner,sun4i-a10-ts";
 			reg = <0x01c25000 0x100>;
 			interrupts = <29>;
 		};

arch/arm/boot/dts/sun5i-a10s.dtsi

@@ -383,7 +383,7 @@ sid: eeprom@01c23800 {
 		};
 
 		rtp: rtp@01c25000 {
-			compatible = "allwinner,sun4i-ts";
+			compatible = "allwinner,sun4i-a10-ts";
 			reg = <0x01c25000 0x100>;
 			interrupts = <29>;
 		};

arch/arm/boot/dts/sun5i-a13.dtsi

@@ -346,7 +346,7 @@ sid: eeprom@01c23800 {
 		};
 
 		rtp: rtp@01c25000 {
-			compatible = "allwinner,sun4i-ts";
+			compatible = "allwinner,sun4i-a10-ts";
 			reg = <0x01c25000 0x100>;
 			interrupts = <29>;
 		};

arch/arm/boot/dts/sun7i-a20.dtsi

@@ -463,7 +463,7 @@ sid: eeprom@01c23800 {
 		};
 
 		rtp: rtp@01c25000 {
-			compatible = "allwinner,sun4i-ts";
+			compatible = "allwinner,sun4i-a10-ts";
 			reg = <0x01c25000 0x100>;
 			interrupts = <0 29 4>;
 		};