graphics/drm-next-kmod: chase base upgrades to linuxkpi. Increase version check.

Reported by: hps
Reviewed by: swills (mentor), hps (lkpi gplv2 sync)
Approved by: swills (mentor), hps (lkpi gplv2 sync)
Obtained from: FreeBSDDesktop
Differential Revision: https://reviews.freebsd.org/D12416