dt-bindings: touchscreen: edt-ft5x06: Remove unneeded I2C unit name

The following warnings are seen with 'make dt_binding_check':

Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.example.dts:19.22-30.11: Warning (unit_address_vs_reg): /example-0/i2c@00000000: node has a unit name, but no reg or ranges property
Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.example.dts:19.22-30.11: Warning (unit_address_format): /example-0/i2c@00000000: unit name should not have leading 0s

Fix it by removing the unneeded i2c unit name.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.yaml

@@ -109,7 +109,7 @@ examples:
   - |
     #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/arm-gic.h>
-    i2c@00000000 {
+    i2c {
       #address-cells = <1>;
       #size-cells = <0>;
       edt-ft5x06@38 {