libs: encoder: h264_fei: VA-API 1.0 compat
libs: encoder: h264_fei: VA-API 1.0 compat

Use VA_ENC_PACKED_HEADER_H264_SEI compat macro for VA-API 1.0
compatibility.

https://bugzilla.gnome.org/show_bug.cgi?id=787322

Signed-off-by: U. Artie Eoff <32aece0d55055227b44d04b7d0051cf3d04ee871@intel.com>

ceyusa/gstreamer-vaapi,GStreamer/gstreamer-vaapi,GStreamer/gstreamer-vaapi,ceyusa/gstreamer-vaapi