mx6cuboxi: Fix Ethernet after DT sync with Linux

The i.MX6 Cubox-i and HummingBoards can have different PHYs at varying
addresses. U-Boot needs to auto-detect which phy is actually present,
and at which address it is responding.

Auto-detection from multiple phy nodes specified in device-tree does not
currently work correct. As a work-around merge all three possible phys
into one node with the special address 0xffffffff which indicates to the
generic phy driver to probe all addresses.

Signed-off-by: Josua Mayer <josua@solid-run.com>
[fabio: Added the changes to imx6qdl-sr-som-u-boot.dtsi.]
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Tested-by: Christian Gmeiner <cgmeiner@igalia.com>
Tested-by: Christian Gmeiner <cgmeiner@igalia.com>
diff --git a/arch/arm/dts/imx6qdl-hummingboard2-emmc-som-v15-u-boot.dtsi b/arch/arm/dts/imx6qdl-hummingboard2-emmc-som-v15-u-boot.dtsi
index e9b188e..358cf8a 100644
--- a/arch/arm/dts/imx6qdl-hummingboard2-emmc-som-v15-u-boot.dtsi
+++ b/arch/arm/dts/imx6qdl-hummingboard2-emmc-som-v15-u-boot.dtsi
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0+
 
 #include "imx6qdl-u-boot.dtsi"
+#include "imx6qdl-sr-som-u-boot.dtsi"
 
 / {
 	board-detect {