LU-9121 lnet: UDSP storage and marshalled structs

LU-9121 lnet: UDSP storage and marshalled structs

Commit the structures which will be used by kernel space
to store the UDSPs. This commit also adds the IOCTL structures
which are used for marshalling the UDSPs between user and
kernel space.

Test-Parameters: trivial testlist=lnet-selftest,sanity-lnet
Signed-off-by: Amir Shehata <ashehata@whamcloud.com>
Change-Id: I490fa9a050cb1f8debc381be773cda4ce8abe29b
Reviewed-on: https://review.whamcloud.com/34253
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>