MFH: r508284 r508285

graphics/drm-devel-kmod: Update snapshot

Update graphics/drm-devel-kmod to the latest snapshot. Fixes a panic on
ppc64 POWER9.

FreeBSD Graphics issue: #161

			https://github.com/FreeBSDDesktop/kms-drm/issues/161

graphics/drm-current-kmod: Update snapshot

Update graphics/drm-current-kmod to the latest snapshot. Fixes a panic on
ppc64 POWER9.

FreeBSD Graphics issue: #161

			https://github.com/FreeBSDDesktop/kms-drm/issues/161

Hand merge files because of differences in PORTREVISION.

Approved by: portmgr (implicit, drm-drivers blanket)