arm64: dts: fsl-ls1028a-rdb: Specify in-band mode for ENETC port 0

As part of the transition of the enetc ethernet driver from phylib
to phylink, the in-band operation mode of the SGMII interface
from enetc port 0 needs to be specified explicitly for phylink.
Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts

@@ -199,6 +199,7 @@ qsgmii_phy3: ethernet-phy@13 {
 &enetc_port0 {
 	phy-handle = <&sgmii_phy0>;
 	phy-connection-type = "sgmii";
+	managed = "in-band-status";
 	status = "okay";
 
 	mdio {