ARM: dts: imx8mm-verdin: drop rgmii_rxc_dly/txc_dly

The FEC in the i.MX8MM doesn't support this feature. So don't pretend one
can use it.
Signed-off-by: NMax Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: NIgor Opaniuk <igor.opaniuk@toradex.com>
Acked-by: NPeng Fan <peng.fan@nxp.com>
Reviewed-by: NOleksandr Suvorov <oleksandr.suvorov@toradex.com>

arch/arm/dts/imx8mm-verdin.dts

@@ -153,8 +153,6 @@
 
 &fec1 {
 	fsl,magic-packet;
-	fsl,rgmii_rxc_dly;
-	fsl,rgmii_txc_dly;
 	phy-handle = <&ethphy0>;
 	phy-mode = "rgmii";
 	phy-supply = <&reg_ethphy>;