drm/radeon/kms: add dpm support for sumo asics (v2)

This adds dpm support for sumo asics.  This includes:
- clockgating
- powergating
- dynamic engine clock scaling
- dynamic voltage scaling

set radeon.dpm=1 to enable it.

v2: fix indention

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>

diff --cc drivers/gpu/drm/radeon/Makefile
Simple merge

diff --cc drivers/gpu/drm/radeon/radeon_asic.c
Simple merge

diff --cc drivers/gpu/drm/radeon/radeon_asic.h
Simple merge

diff --cc drivers/gpu/drm/radeon/radeon_pm.c
Simple merge

diff --cc drivers/gpu/drm/radeon/sumo_dpm.c
Simple merge

diff --cc drivers/gpu/drm/radeon/sumo_dpm.h
Simple merge

diff --cc drivers/gpu/drm/radeon/sumo_smc.c
Simple merge

diff --cc drivers/gpu/drm/radeon/sumod.h
Simple merge