LU-8066 lnet: properly isolate kernel_param_ops

LU-8066 lnet: properly isolate kernel_param_ops

Don't reference kernel_param_ops if not available.  There is
already a HAVE_KERNEL_PARAM_OPS configure check for this, but
it is just misplaced.

Fixes: 7092309f32516cbfb95a964c87b8030129edeb27

Lustre-change: https://review.whamcloud.com/33874
Lustre-commit: eb5a6f97af63585bb92ff65ad441a2281041bc47

Test-Parameters: trivial
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I56f86257c6bc8a9c53c7901bc2765e10587cab07
Reviewed-by: Sonia Sharma <sharmaso@whamcloud.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: https://review.whamcloud.com/35542
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Shaun Tancheff <stancheff@cray.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>