radeon: add berlin pci ids

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
radeon: pad CS to 8 DW

Aligns the IB to 8 DWs.  The aligns the IB to the
CP fetch size.  r6xx also require at least 4 DW
alignment to avoid a hw bug.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
modetest: add a -D option to specify a device to be used

This is helpful for differentiating between multiple devices that use
the same module.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Rob Clark <robdclark@gmail.com>
modetest: allow setting a scaling factor when showing plane

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Rob Clark <robdclark@gmail.com>