ARM: dts: tbs711: Fix touchscreen compatible

The edt,edt-ft5x06 compatible has never been a valid compatible
according to the binding. Let's change for one that is.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20210901091852.479202-46-maxime@cerno.tech

arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts

@@ -169,7 +169,7 @@ &i2c0 {
 	status = "okay";
 
 	touchscreen@38 {
-		compatible = "edt,edt-ft5x06";
+		compatible = "edt,edt-ft5206";
 		reg = <0x38>;
 		interrupt-parent = <&r_pio>;
 		interrupts = <0 7 IRQ_TYPE_EDGE_FALLING>; /* PL7 */