LU-13005 lnet: remove lib-eq.

LU-13005 lnet: remove lib-eq.

There is nothing of value in left in lib-eq.  An 'lnet_eq' just holds
a function pointer.
So change all 'struct lnet_eq' pointers to function pointers, and
bypass the "event queues".

Signed-off-by: Mr NeilBrown <neilb@suse.de>
Change-Id: I16786e44ab712a76860fe8d83543a292555cf557
Reviewed-on: https://review.whamcloud.com/36847
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Chris Horn <chris.horn@hpe.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>