dt-bindings: arm64: add Marvell COM Express boards

Add dt bindings for:
CN9130 COM Express CPU module
CN9131 COM Express CPU module
AC5X RD COM Express Type 7 carrier board.
AC5X RD COM Express board with a CN9131 COM Express Type 7 CPU module.
Signed-off-by: Elad Nachman <enachman@marvell.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

Documentation/devicetree/bindings/arm/marvell/armada-7k-8k.yaml

@@ -60,4 +60,26 @@ properties:
           - const: marvell,armada-ap807-quad
           - const: marvell,armada-ap807
 
+      - description:
+          Alleycat5X (98DX35xx) Reference Design as COM Express Carrier plus
+          Armada CN9130 COM Express CPU module
+        items:
+          - const: marvell,cn9130-ac5x-carrier
+          - const: marvell,rd-ac5x-carrier
+          - const: marvell,cn9130-cpu-module
+          - const: marvell,cn9130
+          - const: marvell,armada-ap807-quad
+          - const: marvell,armada-ap807
+
+      - description:
+          Alleycat5X (98DX35xx) Reference Design as COM Express Carrier plus
+          Armada CN9131 COM Express CPU module
+        items:
+          - const: marvell,cn9131-ac5x-carrier
+          - const: marvell,rd-ac5x-carrier
+          - const: marvell,cn9131-cpu-module
+          - const: marvell,cn9131
+          - const: marvell,armada-ap807-quad
+          - const: marvell,armada-ap807
+
 additionalProperties: true