MFH: r469162 r469250

Update drm-next-kmod, drm-stable-kmod and gpu-firmware-kmod to latest
versions from upstream git.

This brings:

• shorter module names for the GPU firmwares
• addition to the kld category for all three ports
• fixes from FreeBSDDesktop since last update
• fixes to build on latest current, after r333263 [0]

Submitted by: jmd, zeising [0]
Approved by: maintainer (jmd)
Differential Revision: https://reviews.freebsd.org/D14765 (based on)

Fix dependency on gpu-firmware-kmod

Fix the dependency on gpu-firmware-kmod, the version used was about a year
off.
Bump portrevision since dependency changed.

Approved by: jmd (maintainer)
X-MFH-notes: merge with r469162

Approved by: ports-secteam (riggs)