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/M54451EVB_stmicro.dts b/arch/m68k/dts/M54451EVB_stmicro.dts
index 9a088e1..6645b58 100644
--- a/arch/m68k/dts/M54451EVB_stmicro.dts
+++ b/arch/m68k/dts/M54451EVB_stmicro.dts
@@ -23,3 +23,11 @@
 &dspi0 {
 	status = "okay";
 };
+
+&fec0 {
+	status = "okay";
+};
+
+&fec1 {
+	status = "okay";
+};