drm/amd/powerplay: add uvd/vce dpm enabling flag to fix the performance issue for CZ

BugLink: http://bugs.launchpad.net/bugs/1580526



commit 60123300 upstream.

Set the UVD and VCE DPM flags otherwise UVD and VCE DPM won't get enabled.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Signed-off-by: Alberto Milone <alberto.milone@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>