linuxkpi: Add copy_from_user_inatomic_nontemporal() function

In Linux 7.1, __copy_from_user_inatomic_nocache() was renamed to
copy_from_user_inatomic_nontemporal(). This change was backported to
several LTS branches.

This includes Linux 6.12.x and the i915 DRM driver started to use it in
that version.

Reviewed by: bz
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D56719