ENC:disable SVC feature of AVC encoder on SKL/APL/KBL
ENC:disable SVC feature of AVC encoder on SKL/APL/KBL

this is WA to disable SVC featrue as new improved AVC does not support it

Fixes #116

Signed-off-by: Pengfei Qu <3770d20c463a9a2048391f18839a717424bdb1b3@intel.com>
(cherry picked from commit e984be6a7b6d019fed79db037683cfec4ef09ab9)

01org/iotg-lin-gfx-va-driver,01org/iotg-lin-gfx-va-driver,01org/iotg-lin-gfx-va-driver,01org/iotg-lin-gfx-va-driver,01org/iotg-lin-gfx-va-driver