drm/amd/powerplay: refine powerplay code for CZ/ST

1. add function points instand of creat function tables
2. implement stop dpm tasks for CZ/ST
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/hwmgr/cz_clockpowergating.c

@@ -103,16 +103,6 @@ int cz_phm_ungate_all_display_phys(struct pp_hwmgr *hwmgr)
 	return 0;
 }
 
-static int cz_tf_uvd_power_gating_initialize(struct pp_hwmgr *hwmgr, void *pInput, void *pOutput, void *pStorage, int Result)
-{
-	return 0;
-}
-
-static int cz_tf_vce_power_gating_initialize(struct pp_hwmgr *hwmgr, void *pInput, void *pOutput, void *pStorage, int Result)
-{
-	return 0;
-}
-
 int cz_enable_disable_uvd_dpm(struct pp_hwmgr *hwmgr, bool enable)
 {
 	struct cz_hwmgr *cz_hwmgr = (struct cz_hwmgr *)(hwmgr->backend);
@@ -221,23 +211,3 @@ int cz_dpm_powergate_vce(struct pp_hwmgr *hwmgr, bool bgate)
 	return 0;
 }
 
-
-static const struct phm_master_table_item cz_enable_clock_power_gatings_list[] = {
-	/*we don't need an exit table here, because there is only D3 cold on Kv*/
-	{
-	  .isFunctionNeededInRuntimeTable = phm_cf_want_uvd_power_gating,
-	  .tableFunction = cz_tf_uvd_power_gating_initialize
-	},
-	{
-	  .isFunctionNeededInRuntimeTable = phm_cf_want_vce_power_gating,
-	  .tableFunction = cz_tf_vce_power_gating_initialize
-	},
-	/* to do { NULL, cz_tf_xdma_power_gating_enable }, */
-	{ }
-};
-
-const struct phm_master_table_header cz_phm_enable_clock_power_gatings_master = {
-	0,
-	PHM_MasterTableFlag_None,
-	cz_enable_clock_power_gatings_list
-};