MFH: r506311 r506335 r506353 r506354

Merge the latest round of changes to drm-kmod ports.
In short, this updats maintainer addresses and adds fixes for a memory leak.

Original commit messages below

Change maintainer of all drm kmod ports to x11@

Change maintainer of all drm kmod ports to x11@FreeBSD.org. This way, PRs,
notice about build breakages from package builds and so on goes to the
entire x11@ team, and not just one member.

Approved by: jmd (maintainer)

graphics/drm-kmod: Update supported versions

Update supported versions and ports selection in graphics/drm-kmod. This
only affects current.

Reviewed by: jmd
Sponsored by: B3 Init

graphics/drm-current-kmod: Update snapshot

Update snapshot of graphics/drm-curent-kmod to include a fix for a memory
leak.

FreeBSD Graphics issue: #155

			https://github.com/FreeBSDDesktop/kms-drm/issues/155

PR: 238925
Reported by: Ting-Wei Lan
Sponsored by: B3 Init (zeising)

graphics/drm-fbsd12.0-kmod: Update snapshot

Update snapshot of graphics/drm-fbsd12.0-kmod to include a fix for a memory
leak.

FreeBSD Graphics issue: #155

			https://github.com/FreeBSDDesktop/kms-drm/issues/155

PR: 238925
Reported by: Ting-Wei Lan
Sponsored by: B3 Init (zeising)

Approved by: portmgr (drm drivers blanket)