m68k: add fec fdt overrides to all boards

Add ethernet controller overrides for all involved boards.

Signed-off-by: Angelo Durgehello <angelo.dureghello@timesys.com>
diff --git a/arch/m68k/dts/M5475CFE.dts b/arch/m68k/dts/M5475CFE.dts
index 4c92c33..f1033f7 100644
--- a/arch/m68k/dts/M5475CFE.dts
+++ b/arch/m68k/dts/M5475CFE.dts
@@ -11,3 +11,11 @@
 	compatible = "fsl,M5475CFE";
 };
 
+&fec0 {
+	status = "okay";
+};
+
+&fec1 {
+	status = "okay";
+	mii-base = <0>;
+};