net: stmmac: dwmac-intel-plat: remove config data on error

Remove the config data when rate setting fails.

Fixes: 9efc9b2b ("net: stmmac: Add dwmac-intel-plat for GBE driver")
Signed-off-by: Pan Bian <bianpan2016@163.com>
Link: https://lore.kernel.org/r/20210120110745.36412-1-bianpan2016@163.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/stmicro/stmmac/dwmac-intel-plat.c

@@ -129,7 +129,7 @@ static int intel_eth_plat_probe(struct platform_device *pdev)
 				if (ret) {
 					dev_err(&pdev->dev,
 						"Failed to set tx_clk\n");
-					return ret;
+					goto err_remove_config_dt;
 				}
 			}
 		}
@@ -143,7 +143,7 @@ static int intel_eth_plat_probe(struct platform_device *pdev)
 			if (ret) {
 				dev_err(&pdev->dev,
 					"Failed to set clk_ptp_ref\n");
-				return ret;
+				goto err_remove_config_dt;
 			}
 		}
 	}