dt-bindings: marvell: armada-37xx: add Methode eDPU compatible

Document compatible for the Methode eDPU Armada 3720 based board.
Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

Documentation/devicetree/bindings/arm/marvell/armada-37xx.yaml

@@ -20,6 +20,7 @@ properties:
               - cznic,turris-mox
               - globalscale,espressobin
               - marvell,armada-3720-db
+              - methode,edpu
               - methode,udpu
           - const: marvell,armada3720
           - const: marvell,armada3710