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/cobra5272.dts b/arch/m68k/dts/cobra5272.dts
index f3b7497..6085eee 100644
--- a/arch/m68k/dts/cobra5272.dts
+++ b/arch/m68k/dts/cobra5272.dts
@@ -20,3 +20,6 @@
 	status = "okay";
 };
 
+&fec0 {
+	status = "okay";
+};