drm/amdgpu:PTE flag should be 64 bit width

otherwise we'll lost the high 32 bit for pte, which lead
to incorrect MTYPE for vega10.

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

@@ -765,7 +765,7 @@ int amdgpu_ttm_recover_gart(struct amdgpu_device *adev)
 {
 	struct amdgpu_ttm_tt *gtt, *tmp;
 	struct ttm_mem_reg bo_mem;
-	uint32_t flags;
+	uint64_t flags;
 	int r;
 
 	bo_mem.mem_type = TTM_PL_TT;