drm/amdgpu: drop pm_sysfs_en flag from amdgpu_device structure

pm_sysfs_en is overlapped with pm.sysfs_initialized, so drop it
for simplifying code(no functional change).
Signed-off-by: Guchun Chen <guchun.chen@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

@@ -1022,7 +1022,6 @@ struct amdgpu_device {
 	bool                            in_runpm;
 	bool                            has_pr3;
 
-	bool                            pm_sysfs_en;
 	bool                            ucode_sysfs_en;
 	bool                            psp_sysfs_en;
 

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -3863,11 +3863,8 @@ int amdgpu_device_init(struct amdgpu_device *adev,
 	adev->mm_stats.log2_max_MBps = ilog2(max(1u, max_MBps));
 
 	r = amdgpu_pm_sysfs_init(adev);
-	if (r) {
-		adev->pm_sysfs_en = false;
-		DRM_ERROR("registering pm debugfs failed (%d).\n", r);
-	} else
-		adev->pm_sysfs_en = true;
+	if (r)
+		DRM_ERROR("registering pm sysfs failed (%d).\n", r);
 
 	r = amdgpu_ucode_sysfs_init(adev);
 	if (r) {
@@ -4013,7 +4010,7 @@ void amdgpu_device_fini_hw(struct amdgpu_device *adev)
 	if (adev->mman.initialized)
 		drain_workqueue(adev->mman.bdev.wq);
 
-	if (adev->pm_sysfs_en)
+	if (adev->pm.sysfs_initialized)
 		amdgpu_pm_sysfs_fini(adev);
 	if (adev->ucode_sysfs_en)
 		amdgpu_ucode_sysfs_fini(adev);