salvager: Don't lie about locked-ness to namei_SLC

We have not locked the linktable with a prior call to
namei_GetLinkCount. So don't claim that we did.

Change-Id: I43adf92b60a0e46b90ae624e4713747585d12c67
Reviewed-on: http://gerrit.openafs.org/10198
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: D Brashear <shadow@your-file-system.com>