GFX: Support for Graphics Device ID change in CLV+

GFX: Support for Graphics Device ID change in CLV+

BZ: 28684

PCI Device ID for Graphics changed from 0x08C7 in CLV A0 to 0x08C8 in CLV+.
This patch adds support for that change

Change-Id: I8dcbcc3378ea488245a429ddde3399121f60aa31
Signed-off-by: Venkat Jayaraman <venkat.jayaraman@intel.com>
Reviewed-on: http://android.intel.com:8080/40279
Reviewed-by: Renganathan, Prabu <prabu.renganathan@intel.com>
Reviewed-by: Ponnusamy, Siva Prasath <siva.prasath.ponnusamy@intel.com>
Reviewed-by: Dai, Yu <yu.dai@intel.com>
Reviewed-by: Xu, Randy <randy.xu@intel.com>
Tested-by: Xu, Randy <randy.xu@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>