This port allows us to provide updated DRM kernel drivers on FreeBSD
9.3. Kernel modules are suffixed with "_port" compared to the vanilla
drivers (eg. i915kms.ko becomes i915kms_port.ko). The device-independent
module, renamed as drm2_port.ko, is also included. However, Radeon
firmwares are not: the vanilla ones are still being used.
xf86-video-ati and xf86-video-intel depends on drm-kmod on FreeBSD 9.3.
These ports are modified to automatically load the *_port kernel module.
This initial version brings hardware context support to the i915 driver.
This feature is required by Mesa 9.2+, which itself is required by
xserver 1.15+.
Differential Revision: https://reviews.freebsd.org/D2149
Reviewed by: kwm
Approved by: kwm
Tested by: Florian Degner <f.degner@gmx.de>
