arm64: dts: marvell: armada-37xx: declare the COMPHY node

Describe the A3700 COMPHY node. It has three PHYs that can be
configured as follow:
* PCIe or GbE
* USB3 or GbE
* SATA or USB3
Each of them has its own memory area.
Suggested-by: Grzegorz Jaszczyk <jaz@semihalf.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

arch/arm64/boot/dts/marvell/armada-37xx.dtsi

@@ -247,6 +247,35 @@ nb_pm: syscon@14000 {
 				reg = <0x14000 0x60>;
 			};
 
+			comphy: phy@18300 {
+				compatible = "marvell,comphy-a3700";
+				reg = <0x18300 0x300>,
+				      <0x1F000 0x400>,
+				      <0x5C000 0x400>,
+				      <0xe0178 0x8>;
+				reg-names = "comphy",
+					    "lane1_pcie_gbe",
+					    "lane0_usb3_gbe",
+					    "lane2_sata_usb3";
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				comphy0: phy@0 {
+					reg = <0>;
+					#phy-cells = <1>;
+				};
+
+				comphy1: phy@1 {
+					reg = <1>;
+					#phy-cells = <1>;
+				};
+
+				comphy2: phy@2 {
+					reg = <2>;
+					#phy-cells = <1>;
+				};
+			};
+
 			pinctrl_sb: pinctrl@18800 {
 				compatible = "marvell,armada3710-sb-pinctrl",
 					     "syscon", "simple-mfd";