net/mlx5: E-switch, Add checking for flow rule destinations

Firmware doesn't allow flow rules in FDB to do header rewrite and send
packets to both internal and uplink vports. The following syndrome
will be generated when trying to offload such kind of rules:

mlx5_core 0000:08:00.0: mlx5_cmd_out_err:803:(pid 23569): SET_FLOW_TABLE_ENTRY(0x936) op_mod(0x0) failed, status bad parameter(0x3), syndrome (0x8c8f08), err(-22)

To avoid this syndrome, add a checking before creating FTE. If a rule
with header rewrite action forwards packets to both VF and PF, an
error is returned directly.

Signed-off-by: Jianbo Liu <jianbol@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>