Pass the mb_intra_struct by using thread payload on haswell

Pass the mb_intra_struct by using thread payload on haswell

Now the mb_intra_struct is calculated by the GPU thread.
But when handling the logic for multi-slice, the GPU calculation will
become complex.So pass the intra struct flag of macroblock by using
thread payload.

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>