follows void** for VASurfaceAttributeTPI.buffers

it supports 64bits system as well

Signed-off-by: Sameer Kibey <sameer.kibey@intel.com>
Signed-off-by: Halley Zhao <halley.zhao@intel.com>

Change-Id: I4b5b4f35503cb328486c6522c91150b692aef31b