ARM: dts: imx7: imx7_colibri: introduce fec node

Sync DTS with the mainline Linux and introduce fec node and
regulator configuration for rn5t567 PMU.

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
diff --git a/arch/arm/dts/imx7d.dtsi b/arch/arm/dts/imx7d.dtsi
index 30b0589..75566c7 100644
--- a/arch/arm/dts/imx7d.dtsi
+++ b/arch/arm/dts/imx7d.dtsi
@@ -44,6 +44,9 @@
 #include "imx7s.dtsi"
 
 / {
+	aliases {
+		ethernet1 = &fec2;
+	};
 	cpus {
 		cpu0: cpu@0 {
 			operating-points = <