linuxkpi: Add few more include in linux/kernel.h

Those are needed and also included in linux (via polution).

Reviewed by: bz
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D36111

(cherry picked from commit 4b2cb13e916218f815ee5ecc8338635c6a4f261b)