ARM: dts: imx: replace undocumented compatible string edt,edt-ft5x06 with edt,edt-ft5206

The edt,edt-ft5x06 compatible is not referenced in
drivers/input/touchscreen/edt-ft5x06.c and is not documented.

There is no publicly available datasheet or binding information that
distinguishes edt-ft5206/ft5306/ft5406 variants and the driver treats these
FT5x06-family controllers with the same configuration model. So switch to
the lowest common and documented baseline compatible edt,edt-ft5206.

Fix below CHECK_DTBS warnings:
arch/arm/boot/dts/nxp/imx/imx53-m53menlo.dtb: /soc/bus@60000000/i2c@63fc8000/touchscreen@38: failed to match any schema with compatible: ['edt,edt-ft5x06']

ABI impact consideration:
Not affect Linux kernel. The I2C subsystem uses a legacy fallback mechanism
where it strips the vendor prefix from the compatible string to derive the
client name, resulting in edt-ft5x06

	{ .name = "edt-ft5x06", .driver_data = (long)&edt_ft5x06_data },

After this, the driver was actively binding to these devices based on the
compatible string.

Known user (U-Boot) does not parse or use edt,edt-ft* touchscreen
compatibles.

Signed-off-by: Frank Li <Frank.Li@nxp.com>

Author: nxpfrankli

arch/arm/boot/dts/nxp/imx/imx53-m53menlo.dts

@@ -248,7 +248,7 @@
 	status = "okay";
 
 	touchscreen@38 {
-		compatible = "edt,edt-ft5x06";
+		compatible = "edt,edt-ft5206";
 		reg = <0x38>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_edt_ft5x06>;

arch/arm/boot/dts/nxp/imx/imx53-tx53-x03x.dts

@@ -201,7 +201,7 @@
 	};
 
 	polytouch: edt-ft5x06@38 {
-		compatible = "edt,edt-ft5x06";
+		compatible = "edt,edt-ft5206";
 		reg = <0x38>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_edt_ft5x06_1>;

arch/arm/boot/dts/nxp/imx/imx6q-var-dt6customboard.dts

@@ -169,7 +169,7 @@
 	status = "okay";
 
 	touchscreen@38 {
-		compatible = "edt,edt-ft5x06";
+		compatible = "edt,edt-ft5206";
 		reg = <0x38>;
 		interrupt-parent = <&gpio1>;
 		interrupts = <4 IRQ_TYPE_EDGE_FALLING>;

arch/arm/boot/dts/nxp/imx/imx6qdl-nit6xlite.dtsi

@@ -256,7 +256,7 @@
 	};
 
 	touchscreen@38 {
-		compatible = "edt,edt-ft5x06";
+		compatible = "edt,edt-ft5206";
 		reg = <0x38>;
 		interrupt-parent = <&gpio1>;
 		interrupts = <9 IRQ_TYPE_EDGE_FALLING>;

arch/arm/boot/dts/nxp/imx/imx6qdl-nitrogen6_max.dtsi

@@ -405,7 +405,7 @@
 	};
 
 	touchscreen@38 {
-		compatible = "edt,edt-ft5x06";
+		compatible = "edt,edt-ft5206";
 		reg = <0x38>;
 		interrupt-parent = <&gpio1>;
 		interrupts = <9 IRQ_TYPE_EDGE_FALLING>;

arch/arm/boot/dts/nxp/imx/imx6qdl-nitrogen6_som2.dtsi

@@ -326,7 +326,7 @@
 	};
 
 	touchscreen@38 {
-		compatible = "edt,edt-ft5x06";
+		compatible = "edt,edt-ft5206";
 		reg = <0x38>;
 		interrupt-parent = <&gpio1>;
 		interrupts = <9 IRQ_TYPE_EDGE_FALLING>;

arch/arm/boot/dts/nxp/imx/imx6qdl-nitrogen6x.dtsi

@@ -333,7 +333,7 @@
 	};
 
 	touchscreen@38 {
-		compatible = "edt,edt-ft5x06";
+		compatible = "edt,edt-ft5206";
 		reg = <0x38>;
 		interrupt-parent = <&gpio1>;
 		interrupts = <9 IRQ_TYPE_EDGE_FALLING>;

arch/arm/boot/dts/nxp/imx/imx6qdl-pico.dtsi

@@ -217,7 +217,7 @@
 	status = "okay";
 
 	touchscreen@38 {
-		compatible = "edt,edt-ft5x06";
+		compatible = "edt,edt-ft5206";
 		reg = <0x38>;
 		interrupt-parent = <&gpio5>;
 		interrupts = <31 IRQ_TYPE_EDGE_FALLING>;

arch/arm/boot/dts/nxp/imx/imx6qdl-tx6.dtsi

@@ -296,7 +296,7 @@
 	};
 
 	polytouch: edt-ft5x06@38 {
-		compatible = "edt,edt-ft5x06";
+		compatible = "edt,edt-ft5206";
 		reg = <0x38>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_edt_ft5x06>;

arch/arm/boot/dts/nxp/imx/imx6ul-pico-hobbit.dts

@@ -62,7 +62,7 @@
 	status = "okay";
 
 	polytouch: touchscreen@38 {
-		compatible = "edt,edt-ft5x06";
+		compatible = "edt,edt-ft5206";
 		reg = <0x38>;
 		interrupt-parent = <&gpio1>;
 		interrupts = <29 IRQ_TYPE_EDGE_FALLING>;