net: stmmac: platform: Delete a redundant condition branch

The statement of the last "if (xxx)" branch is the same as the "else"
branch. Delete it to simplify code.

No functional change.
Signed-off-by: NZhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c

@@ -230,8 +230,6 @@ static int stmmac_mtl_setup(struct platform_device *pdev,
 		plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WFQ;
 	else if (of_property_read_bool(tx_node, "snps,tx-sched-dwrr"))
 		plat->tx_sched_algorithm = MTL_TX_ALGORITHM_DWRR;
-	else if (of_property_read_bool(tx_node, "snps,tx-sched-sp"))
-		plat->tx_sched_algorithm = MTL_TX_ALGORITHM_SP;
 	else
 		plat->tx_sched_algorithm = MTL_TX_ALGORITHM_SP;