LU-15983 lnet: Define KFILND network type

LU-15983 lnet: Define KFILND network type

Define the KFILND network type. This reserves the network type number
for future implementation and allows creation of kfi peers and
adding routes to kfi peers.

Lustre-commit: 5fea36c952373c9a235be7bf57eb2e516fcb36b2
Lustre-change: https://review.whamcloud.com/47830

Test-Parameters: trivial testlist=sanity-lnet
HPE-bug-id: LUS-11060
Signed-off-by: Chris Horn <chris.horn@hpe.com>
Change-Id: I9111645f1290c8af4937d1b2689a068df81922a4
Reviewed-on: https://review.whamcloud.com/48220
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>