Linux: Remove extra "goto out" from tmpfs fix

Remove a stray "goto out" that should not have been applied in
this spot along with the tmpfs fix.

Thanks to Stephan Wiesand for pointing it out.

Change-Id: I6f798029a948446b974456648513ea7db4469561
Reviewed-on: http://gerrit.openafs.org/9953
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>