LU-17708 lnet: update kfi and o2ib to handle NULL lnet_msg

LU-17708 lnet: update kfi and o2ib to handle NULL lnet_msg

Handle the handle NULL lnet_msg cases in the lnd_recf() handlers
of kfi and o2ib lnds.

HPE-bug-id: LUS-12245
Test-Parameters: trivial
Signed-off-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Change-Id: Ia0a8957653353380ef77c9686a020284db0e460c
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/54677
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Chris Horn <chris.horn@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>