graphics/drm-515-kmod: add extra patch to unbreak stable/14, and 14.4-R

Conditionally apply the patch from 26b48400ee94 to avoid conflicts with
an updated LinuxKPI. This should make this port both build and work again.
The patch is conditional still as 14.3-R does not, but stable/14 and 14.4-R
do have the LinuxKPI changes.

Sponsored by: The FreeBSD Foundation
PR: 290432
Reported by: gja822@narod.ru