dt-bindings: oxnas: Update Pinctrl and GPIO for OX820 Support

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Documentation/devicetree/bindings/gpio/gpio_oxnas.txt

@@ -3,7 +3,7 @@
 Please refer to gpio.txt for generic information regarding GPIO bindings.
 
 Required properties:
- - compatible: "oxsemi,ox810se-gpio"
+ - compatible: "oxsemi,ox810se-gpio" or "oxsemi,ox820-gpio"
  - reg: Base address and length for the device.
  - interrupts: The port interrupt shared by all pins.
  - gpio-controller: Marks the port as GPIO controller.

Documentation/devicetree/bindings/pinctrl/oxnas,pinctrl.txt

@@ -9,7 +9,7 @@ used for a specific device or function. This node represents configurations of
 pins, optional function, and optional mux related configuration.
 
 Required properties for pin controller node:
- - compatible: "oxsemi,ox810se-pinctrl"
+ - compatible: "oxsemi,ox810se-pinctrl" or "oxsemi,ox820-pinctrl"
  - oxsemi,sys-ctrl: a phandle to the system controller syscon node
 
 Required properties for pin configuration sub-nodes: