[Intel-gfx] [PATCH v2] drm/i915: Use true PPGTT in Gen8+ when execlists are enabled

[shuang.he at intel.com]

Tested-By: PRC QA PRTS (Patch Regression Test System Contact: shuang.he at intel.com)
-------------------------------------Summary-------------------------------------
Platform          Delta          drm-intel-nightly          Series Applied
PNV                                  366/366              366/366
ILK              +5                 360/366              365/366
SNB                                  448/450              448/450
IVB                                  497/498              497/498
BYT                                  289/289              289/289
HSW                                  563/564              563/564
BDW                                  417/417              417/417
-------------------------------------Detailed-------------------------------------
Platform  Test                                drm-intel-nightly          Series Applied
 ILK  igt_drv_suspend_fence-restore-untiled      DMESG_WARN(1, M26)PASS(7, M37M26)      PASS(1, M37)
 ILK  igt_kms_flip_bcs-flip-vs-modeset-interruptible      DMESG_WARN(1, M26)PASS(7, M37M26)      PASS(1, M37)
 ILK  igt_kms_flip_busy-flip-interruptible      DMESG_WARN(2, M26)PASS(6, M37M26)      PASS(1, M37)
 ILK  igt_kms_flip_flip-vs-rmfb-interruptible      DMESG_WARN(1, M26)PASS(7, M37M26)      PASS(1, M37)
 ILK  igt_kms_flip_rcs-flip-vs-dpms      DMESG_WARN(1, M26)PASS(6, M37M26)      PASS(1, M37)
Note: You need to pay more attention to line start with '*'