LU-6142 lnet: remove most of typedefs from LNet headers

LU-6142 lnet: remove most of typedefs from LNet headers

Remove the majority of typedefs from the LNet headers.
Change them into structures instead. Currently only
lnet_nid_t, lnet_pid_t, and lnet_kiov_t are left.

Test-Parameters: trivial

Change-Id: Ib083d305ab945bab8d78ac96d17015550c0f9486
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: https://review.whamcloud.com/20831
Reviewed-by: Olaf Weber <olaf@sgi.com>
Tested-by: Jenkins
Reviewed-by: Doug Oucharek <doug.s.oucharek@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>