net: dwc_eth_qos: introduce eqos hook eqos_get_enetaddr

i.MX has specific hook to get MAC address, so introduce a hook and move
i.MX code to its own driver

Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/drivers/net/dwc_eth_qos.c b/drivers/net/dwc_eth_qos.c
index a4380d1..c1f2391 100644
--- a/drivers/net/dwc_eth_qos.c
+++ b/drivers/net/dwc_eth_qos.c
@@ -712,10 +712,13 @@
 static int eqos_read_rom_hwaddr(struct udevice *dev)
 {
 	struct eth_pdata *pdata = dev_get_plat(dev);
+	struct eqos_priv *eqos = dev_get_priv(dev);
+	int ret;
+
+	ret = eqos->config->ops->eqos_get_enetaddr(dev);
+	if (ret < 0)
+		return ret;
 
-#ifdef CONFIG_ARCH_IMX8M
-	imx_get_mac_from_fuse(dev_seq(dev), pdata->enetaddr);
-#endif
 	return !is_valid_ethaddr(pdata->enetaddr);
 }