LinuxKPI: Add kmap_local_page function

kmap_local_page maps a page for temporary usage

Sponsored by: Serenity CyberSecurity, LLC
MFC after: 1 week
Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D45609

(cherry picked from commit 73f3589120e61b4b9df1ef60c5be12ccd81878f2)