linuxkpi: advance platform_device

These are required by some linux driver like:
https://github.com/beckhoff/bbapi

Reviewed by: manu
MFC after: 1 week
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D39554

(cherry picked from commit 740d76544ad8a59f1be53584a0aa5bbbe00833ee)