Valleyview support in master, full accelerated broadwell in beta test.

[Matthew Dillon]

    After a 2-day marathon we tracked down issues that were preventing
    ValleyView GPUs (primarily in modern Atom CPUs) from working properly
    in DragonFly.  That update is now in master.

    Francois has another iterative DRM update from linux under test in
    his git tree at git://leaf.dragonflybsd.org/~ftigeot/dragonfly.git,
    the current iteration is the "drm_i915_linux_3_16v6" branch and
    sports full broadwell support with acceleration.

    That update will be folded into master as soon as we fix an issue with
    kvm console support that it broke (this does not prevent you from running
    X with it, however).  

    Both the current master and Francois's experimental branches also have
    fixes today for some memory corruption and an HDA sound driver interrupt
    issue.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>