LinuxKPI: Chase for new "name" argument of register_shrinker()

Linux uses it only if SHRINKER_DEBUG config option is enabled. Ignore it.

Sponsored by: Serenity Cyber Security, LLC
Reviewers: manu, bz
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D42809

(cherry picked from commit a39ed121eab16bd2579422f71df7ef29b55965d1)