board: lsxl: disable eth0

The board has only one network interface. The linux kernel will
gracefully skip a the ethernet interface if no connected PHY could be
probed. u-boot on the other hand will throw an error message. The kernel
device tree is about to be fixed. For now, just disable the ethernet
interface in our -u-boot.dtsi.

Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/arch/arm/dts/kirkwood-lschlv2-u-boot.dtsi b/arch/arm/dts/kirkwood-lschlv2-u-boot.dtsi
index 208b02c..7fc2d7d 100644
--- a/arch/arm/dts/kirkwood-lschlv2-u-boot.dtsi
+++ b/arch/arm/dts/kirkwood-lschlv2-u-boot.dtsi
@@ -1,5 +1,9 @@
 // SPDX-License-Identifier: GPL-2.0+
 
+&eth0 {
+	status = "disabled";
+};
+
 &hdd_power {
 	/delete-property/ regulator-always-on;
 };