Update some comment about FEI in VA-API.
Update some comment about FEI in VA-API.

FEI have added in VA-API, update the comments.

Signed-off-by: Jun Zhao <a9404aefee6448c29674fb00fe4b4109ebaab451@intel.com>

01org/libva-cros,01org/libva-cros,01org/libva-cros