net: fex_mxc: add i.MX6UL/SX/SL compatible

Add i.MX6UL/SX/SL compatible.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

drivers/net/fec_mxc.c

@@ -1343,6 +1343,9 @@ static int fecmxc_ofdata_to_platdata(struct udevice *dev)
 
 static const struct udevice_id fecmxc_ids[] = {
 	{ .compatible = "fsl,imx6q-fec" },
+	{ .compatible = "fsl,imx6sl-fec" },
+	{ .compatible = "fsl,imx6sx-fec" },
+	{ .compatible = "fsl,imx6ul-fec" },
 	{ }
 };