Revert "UPSTREAM: f2fs: add missing dput() when printing the donation list"

This reverts commit 4b8b43b1.

Reason for revert: I didn't properly follow protocol and mistook the upstream 6.12 change landing as the 6.6 tree. So I improperly overrode the lint -1.

Reverting this so we keep in sync w/ the upstream android15-6.6 branch.

Change-Id: I538b5b093dc29a467f307d30bff449dc27e7909a
Signed-off-by: John Stultz <jstultz@google.com>
Bug: 448980078
Bug: 449767633