dt-bindings: arm: amlogic: add support for the Beelink GT-King Pro

The Shenzen AZW (Beelink) GT-King Pro is based on the Amlogic W400 reference
board with an S922X chip.
Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200520014329.12469-5-christianshewitt@gmail.com

Documentation/devicetree/bindings/arm/amlogic.yaml

@@ -150,6 +150,7 @@ properties:
         items:
           - enum:
               - azw,gtking
+              - azw,gtking-pro
               - hardkernel,odroid-n2
               - khadas,vim3
               - ugoos,am6