IB/core: Add support for NDR link speed

Add new IBTA speed NDR, supporting signaling rate of 100Gb.

Link: https://lore.kernel.org/r/20201026133738.1340432-2-leon@kernel.org


Signed-off-by: Meir Lichtinger <meirl@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>