This patch moves the ioctls into a file which is shared with 
the BSD drm, so we don't duplicate them across both trees,
it also fixes up the radeon/r128 interface histories so
they are with the driver version strings...

It also removes the old interface files that no longer needed.

From: Eric Anholt <anholt@freebsd.org> and Dave Airlie <airlied@linux.ie>
Signed-off-by: Dave Airlie <airlied@linux.ie>