staging: lustre: ldlm: remove 'first_enq' arg from ldlm_process_flock_lock()

it is only ever set to '1', so we can just assume that and remove the code.

Signed-off-by: NeilBrown <neilb@suse.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>