vfs_cache: Fix the SDT definition of vfs:fplookup:lookup:done
- The definition lists struct nameidata as the type of the first argument. However, the actual probes always pass a variable of type struct nameidata* to SDT_PROBE3.
- The third argument (args[2]) is actually enum cache_fpl_status.
Reviewed by: markj
Approved by: markj (mentor)
Fixes: 07d2145a1717 vfs: add the infrastructure for lockless lookup
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D51315