drm/radeon/dpm: add pre/post_set_power_state callback (sumo)

This properly implemented dynamic state adjustment by
using a working copy of the requested and current
power states.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/sumo_dpm.h

@@ -116,7 +116,6 @@ struct sumo_power_info {
 	struct sumo_pl acpi_pl;
 	struct sumo_pl boot_pl;
 	struct sumo_pl boost_pl;
-	struct sumo_ps current_ps;
 	bool disable_gfx_power_gating_in_uvd;
 	bool driver_nbps_policy_disable;
 	bool enable_alt_vddnb;
@@ -129,7 +128,10 @@ struct sumo_power_info {
 	bool enable_dynamic_patch_ps;
 	bool enable_dpm;
 	bool enable_boost;
-	struct sumo_ps hw_ps;
+	struct radeon_ps current_rps;
+	struct sumo_ps current_ps;
+	struct radeon_ps requested_rps;
+	struct sumo_ps requested_ps;
 };
 
 #define SUMO_UTC_DFLT_00                     0x48