LU-12678 lnet: use list_for_each_entry()

LU-12678 lnet: use list_for_each_entry()

Several loops use list_for_each(), then call list_entry()
each time in the loop This complexity can be replaced with
the use of  list_for_each_entry().

Test-Parameters: trivial testlist=sanity-lnet
Signed-off-by: James Simmons <jsimmons@infradead.org>
Change-Id: Ib7968466c4fce5173b20cbaf6c878975ba522d43
Reviewed-on: https://review.whamcloud.com/43591
Reviewed-by: Chris Horn <chris.horn@hpe.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>