RDMA/uverbs: Add structure size info to write commands

We need the structure sizes to compute the location of the udata in the
core code. Annotate the sizes into the new macro language.

This is generated largely by script and checked by comparing against the
similar list in rdma-core.

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