move from sysclt(KERN_ARND) to getentropy(2); ok miod@, kettenis@
rm unneeded includes; prompted (partly) by kettenis@
add a hook to the cleanup() function to kill $SSH_PID if it is set

use it to kill the mux master started in multiplex.sh (it was being left
around on fatal failures)
drm/radeon: also try GART for CPU accessed buffers

From Christian Koenig
72568eb7e4e40096fd80c7c8abd04ac630e45bb9 in ubuntu 3.8
544092596e8ac269f70e70961b5e9381909c9b1e in mainline linux
drm/radeon: handle non-VGA class pci devices with ATRM

From Alex Deucher
6a6170926060797bdf25e5d6609a3168466f2e6c in ubuntu 3.8
d8ade3526b2aa0505132c404c05a38b73ea15490 in mainline linux
drm/radeon: avoid segfault on device open when accel is not working.

From Jerome Glisse
16d30071c6cd4b72a950d265b0d7d08fb4220b92 in ubuntu 3.8
24f47acc78b0ab5e2201f859fe1f693ae90c7c83 in mainline linux