drm/amdgpu: Remove wrapper layer of smu ip functions

1. delete amdgpu_powerplay.c used for wrapping smu ip functions
2. delete struct pp_instance,
3. make struct hwmgr as the smu hw handle.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/si_dpm.h b/drivers/gpu/drm/amd/amdgpu/si_dpm.h
index 9fe343d..6b7d292 100644
--- a/drivers/gpu/drm/amd/amdgpu/si_dpm.h
+++ b/drivers/gpu/drm/amd/amdgpu/si_dpm.h
@@ -245,8 +245,7 @@ enum si_display_gap
     SI_PM_DISPLAY_GAP_IGNORE       = 3,
 };
 
-extern const struct amd_ip_funcs si_dpm_ip_funcs;
-extern const struct amd_pm_funcs si_dpm_funcs;
+extern const struct amdgpu_ip_block_version si_smu_ip_block;
 
 struct ni_leakage_coeffients
 {