linux(4): Prevent integer overflow in futex_requeue.

To prevent a signed integer overflow in futex_requeue add a sanity check
to catch negative values of nrwake or nrrequeue.

Approved by: so
Security: EN-21:22.linux_futex

(cherry picked from commit 25b09d6f398ea8a260ee8e2e8209fd76c61e13ee)
(cherry picked from commit f80ee27f447abc7baeb413cc0a7b7c21f9d32f8b)