ARM: dts: BCM5301X: Set switch ports for Linksys EA9200

This patch was developed as OpenWrt downstream change and was recently
confirmed to work as expected.

Tested-by: Rani Hod <[e-mail]>
Signed-off-by: Rafał Miłecki <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Florian Fainelli <[e-mail]>

arch/arm/boot/dts/broadcom/bcm4709-linksys-ea9200.dts

···
 &usb3_phy {
 	status = "okay";
 };
+
+&srab {
+	status = "okay";
+
+	ports {
+		port@0 {
+			label = "lan1";
+		};
+
+		port@1 {
+			label = "lan2";
+		};
+
+		port@2 {
+			label = "lan3";
+		};
+
+		port@3 {
+			label = "lan4";
+		};
+
+		port@4 {
+			label = "wan";
+		};
+
+		port@5 {
+			status = "disabled";
+		};
+
+		port@7 {
+			status = "disabled";
+		};
+
+		port@8 {
+			label = "cpu";
+		};
+	};
+};