anv: fix get_tiling fail on gen12
The problem is that nv_gem_get_tiling function of uAPI will assert if the get/set tiling is not supported. To fix this issue, return directly in the function anv_gem_get_tiling() if we don't support get/set_tiling.
Signed-off-by: Junhao Xin junhao.xin@intel.com