LU-9119 lnet: Normalize ioctl interface

To avoid backwards compatibility issues between base MR
and Dynamic Discovery standardize the ioctl interface by
bringing in changes to the interface required by
Dynamic Discovery now.

Test-Parameters: trivial
Signed-off-by: Amir Shehata <amir.shehata@intel.com>
Change-Id: I014d74943b893ec24e3d42e1eb6824d755460c2b
Reviewed-on: https://review.whamcloud.com/26689
Tested-by: Jenkins
Reviewed-by: Olaf Weber <olaf@sgi.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Doug Oucharek <doug.s.oucharek@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>