net: ethernet: stmmac: fix indentation issue

There is a return statement that is indented too deeply, remove
the extraneous tab.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c

@@ -158,7 +158,7 @@ static int stm32mp1_clk_prepare(struct stm32_dwmac *dwmac, bool prepare)
 		ret = clk_prepare_enable(dwmac->clk_eth_ck);
 		if (ret) {
 			clk_disable_unprepare(dwmac->syscfg_clk);
-				return ret;
+			return ret;
 		}
 	} else {
 		clk_disable_unprepare(dwmac->syscfg_clk);