drm/amdgpu: remove power on/off SDMA in SMU hw_init/fini()

Currently, we don't find some neccesities to power on/off
SDMA in SMU hw_init/fini(). It makes more sense in SDMA
hw_init/fini().
Signed-off-by: Lang Yu <lang.yu@amd.com>
Reviewed-by: Kevin Wang <kevinyang.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c

@@ -1350,7 +1350,6 @@ static int smu_hw_init(void *handle)
 	}
 
 	if (smu->is_apu) {
-		smu_powergate_sdma(&adev->smu, false);
 		smu_dpm_set_vcn_enable(smu, true);
 		smu_dpm_set_jpeg_enable(smu, true);
 		smu_set_gfx_cgpg(&adev->smu, true);
@@ -1512,10 +1511,6 @@ static int smu_hw_fini(void *handle)
 	if (amdgpu_sriov_vf(adev)&& !amdgpu_sriov_is_pp_one_vf(adev))
 		return 0;
 
-	if (smu->is_apu) {
-		smu_powergate_sdma(&adev->smu, true);
-	}
-
 	smu_dpm_set_vcn_enable(smu, false);
 	smu_dpm_set_jpeg_enable(smu, false);