net: ethernet: mlx4: Remove unnecessary parentheses

This patch fixes the clang warning of extraneous parentheses, with the
following coccinelle script.

@@
identifier i;
expression e;
statement s;
@@
if (
-(i == e)
+i == e
 )
s

Suggested-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Varsha Rao <rvarsha016@gmail.com>
Acked-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlx4/port.c

@@ -614,9 +614,9 @@ int __mlx4_register_vlan(struct mlx4_dev *dev, u8 port, u16 vlan,
 		int index_at_dup_port = -1;
 
 		for (i = MLX4_VLAN_REGULAR; i < MLX4_MAX_VLAN_NUM; i++) {
-			if ((vlan == (MLX4_VLAN_MASK & be32_to_cpu(table->entries[i]))))
+			if (vlan == (MLX4_VLAN_MASK & be32_to_cpu(table->entries[i])))
 				index_at_port = i;
-			if ((vlan == (MLX4_VLAN_MASK & be32_to_cpu(dup_table->entries[i]))))
+			if (vlan == (MLX4_VLAN_MASK & be32_to_cpu(dup_table->entries[i])))
 				index_at_dup_port = i;
 		}
 		/* check that same vlan is not in the tables at different indices */