LU-9119 lnet: rename LNET_MAX_INTERFACES

LU-9119 lnet: rename LNET_MAX_INTERFACES

LNET_MAX_INTERFACES is the number of interfaces supported by
interface bonding in the ksocknal LND. It shows up in LNet
because a number of data structures are shared between LNDs.

Rename it to LNET_NUM_INTERFACES to reduce the confusion of
what it does.

Test-Parameters: trivial
Signed-off-by: Olaf Weber <olaf@sgi.com>
Change-Id: Ibc1d85a379d6616eb1db2fcb54aaffc835ffa9f4
Reviewed-on: https://review.whamcloud.com/26693
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Doug Oucharek <doug.s.oucharek@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>