net: dwc_eth_xgmac: Use unwind goto on error

In xgmac_probe there is a direct return after the point where unwind
gotos start to be used to undo actions performed by earlier code. Use
the appropriate unwind goto instead.

This issue was found by Smatch.

Signed-off-by: Andrew Goodbody <andrew.goodbody@linaro.org>
Reviewed-by: Tien Fong Chee <tien.fong.chee@altera.com>

drivers/net/dwc_eth_xgmac.c

@@ -1102,7 +1102,7 @@ static int xgmac_probe(struct udevice *dev)
 	ret = xgmac->config->ops->xgmac_start_clks(dev);
 	if (ret < 0) {
 		pr_err("%s xgmac_start_clks() failed: %d\n", dev->name, ret);
-		return ret;
+		goto err_remove_resources_core;
 	}
 
 	if (IS_ENABLED(CONFIG_DM_ETH_PHY))