Fixed encoder slow issue while rendering the same buffer repeatly

BZ: 176245

This patch use vaMap/Unmap instead of vaSyncsurface to guarantee
correct order

Change-Id: Icf5fa8e1a81a41b6ed8b923aaab914c273c4bcaa
Signed-off-by: Ren, Zhaohan <zhaohan.ren@intel.com>
2 files changed