drm/radeon: load the right microcode on rs780
Copy/paste error. The RV670 microcode should work ok, so it's
not a show stopper.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
authored by Alex Deucher and committed by Dave Airlie 029a2edb 5f3dbedf