Add port param set command to set the value for a parameter.
Value can be set to any of the supported configuration modes.

v7->v8: Append "Acked-by: Jiri Pirko <jiri@mellanox.com>"

Cc: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: NVasundhara Volam <vasundhara-v.volam@broadcom.com>
Acked-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>