drm/amdgpu:cleanup stolen vga memory finish

Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1401,15 +1401,10 @@ void amdgpu_ttm_fini(struct amdgpu_device *adev)
 
 	if (!adev->mman.initialized)
 		return;
+
 	amdgpu_ttm_debugfs_fini(adev);
-	if (adev->stolen_vga_memory) {
-		r = amdgpu_bo_reserve(adev->stolen_vga_memory, true);
-		if (r == 0) {
-			amdgpu_bo_unpin(adev->stolen_vga_memory);
-			amdgpu_bo_unreserve(adev->stolen_vga_memory);
-		}
-		amdgpu_bo_unref(&adev->stolen_vga_memory);
-	}
+	amdgpu_bo_free_kernel(&adev->stolen_vga_memory, NULL, NULL);
+
 	ttm_bo_clean_mm(&adev->mman.bdev, TTM_PL_VRAM);
 	ttm_bo_clean_mm(&adev->mman.bdev, TTM_PL_TT);
 	if (adev->gds.mem.total_size)