ARM: dts: NSP: Add Ethernet to NSP XMC

Enable the ethernet in the NSP XMC (bcm958525xmc) device tree
Signed-off-by: NJon Mason <jon.mason@broadcom.com>
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>

arch/arm/boot/dts/bcm958525xmc.dts

@@ -59,7 +59,11 @@
 	};
 };
 
-/* XHCI, MMC, and Ethernet support needed to be complete */
+/* XHCI and SD/MMC support needed to be complete */
+
+&amac0 {
+	status = "okay";
+};
 
 &i2c0 {
 	temperature-sensor@4c {