ARM: dts: mx5: fix wrong stmpe-ts bindings

Fix bindings for STMPE touchscreen controller to match the documented
bindings and the actual bindings used by the driver.
Signed-off-by: NStefan Agner <stefan@agner.ch>
Reviewed-by: NMarek Vasut <marex@denx.de>
Signed-off-by: NShawn Guo <shawn.guo@freescale.com>

arch/arm/boot/dts/imx53-m53evk.dts

@@ -194,17 +194,17 @@
 		irq-trigger = <0x1>;
 
 		stmpe_touchscreen {
-			compatible = "stmpe,ts";
+			compatible = "st,stmpe-ts";
 			reg = <0>;
-			ts,sample-time = <4>;
-			ts,mod-12b = <1>;
-			ts,ref-sel = <0>;
-			ts,adc-freq = <1>;
-			ts,ave-ctrl = <3>;
-			ts,touch-det-delay = <3>;
-			ts,settling = <4>;
-			ts,fraction-z = <7>;
-			ts,i-drive = <1>;
+			st,sample-time = <4>;
+			st,mod-12b = <1>;
+			st,ref-sel = <0>;
+			st,adc-freq = <1>;
+			st,ave-ctrl = <3>;
+			st,touch-det-delay = <3>;
+			st,settling = <4>;
+			st,fraction-z = <7>;
+			st,i-drive = <1>;
 		};
 	};