IB/uverbs: Pass IB_UVERBS_QPF_GRH_REQUIRED to user space

Userspace also needs to know if the port requires GRHs to properly form
the AVs it creates.

Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>