net/mlxfw: Use kzalloc for allocating only one thing

Use kzalloc rather than kcalloc(1,...)

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
@@

- kcalloc(1,
+ kzalloc(
          ...)
// </smpl>
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxfw/mlxfw_mfa2.c

@@ -267,7 +267,7 @@ struct mlxfw_mfa2_file *mlxfw_mfa2_file_init(const struct firmware *fw)
 	const void *first_tlv_ptr;
 	const void *cb_top_ptr;
 
-	mfa2_file = kcalloc(1, sizeof(*mfa2_file), GFP_KERNEL);
+	mfa2_file = kzalloc(sizeof(*mfa2_file), GFP_KERNEL);
 	if (!mfa2_file)
 		return ERR_PTR(-ENOMEM);