linuxkpi: Add list_for_each_prev_safe() in <linux/list.h>
[Why]
The amdgpu DRM driver started to use it in Linux 5.18.
Reviewed by: manu
Approved by: manu
Differential Revision: https://reviews.freebsd.org/D43021
(cherry picked from commit b723bcd05a991d446491e914f2b9f35e66227398)