drm/amdgpu: don't flush the TLB before initializing GART

No point in doing this.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -332,12 +332,13 @@ int amdgpu_gart_bind(struct amdgpu_device *adev, uint64_t offset,
 		adev->gart.pages[p] = pagelist[i];
 #endif
 
-	if (adev->gart.ptr) {
+	if (!adev->gart.ptr)
+		return 0;
+
 	r = amdgpu_gart_map(adev, offset, pages, dma_addr, flags,
 		    adev->gart.ptr);
 	if (r)
 		return r;
-	}
 
 	mb();
 	amdgpu_gart_flush_gpu_tlb(adev, 0);