ARM: dts: imx53: Rename M53 SoM touchscreen node

Rename the touchscreen node to match contemporary design.
Signed-off-by: NMarek Vasut <marex@denx.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
To: linux-arm-kernel@lists.infradead.org
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx53-m53.dtsi

@@ -52,7 +52,7 @@
 	clock-frequency = <400000>;
 	status = "okay";
 
-	stmpe610@41 {
+	touchscreen@41 {
 		compatible = "st,stmpe610";
 		reg = <0x41>;
 		id = <0>;