net/mlx5e: Fix kbuild warnings for uninitialized parameters

kbuild warn about parameters that may be used uninitialized, fix it.

Fixes: a54e20b4 ('net/mlx5e: Add basic TC tunnel set action for SRIOV offloads')
Signed-off-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlx5/core/en_tc.c

@@ -737,8 +737,8 @@ static int mlx5e_create_encap_header_ipv4(struct mlx5e_priv *priv,
 	struct flowi4 fl4 = {};
 	char *encap_header;
 	int encap_size;
-	__be32 saddr;
-	int ttl;
+	__be32 saddr = 0;
+	int ttl = 0;
 	int err;
 
 	encap_header = kzalloc(max_encap_size, GFP_KERNEL);