drm-kmod: New port to previde updated DRM kernel driver on FreeBSD 9.3

[dumbbell]

Summary

On FreeBSD 9.3, the i915 kernel driver lacks a feature (hardware context) required by Mesa 9.2+. This forces us to keep Mesa 9.1 just for FreeBSD 9.3.

The goal of this port is to provide an updated i915 driver and allow us to finally drop Mesa 9.1. The port also packages the Radeon driver: it brings no changes beside an updated dependency to drm2_port.ko (also packaged) instead of drm2.ko.

Test Plan

• Install x11-drivers/drm-kmod
• Install x11-drivers/xf86-video-intel or x11-drivers/xf86-video-ati
• Test your usual desktop applications

[kwm]

The ati and intel driver need there portrevision bumped. While it only impacts 9.3-R the package is changed so we need to do that.

[dumbbell]

Increment port revision of xf86-video-{ati,intel}

[dumbbell]

Closed by commit rP382375 (authored by @dumbbell).