[Intel-gfx] [PATCH] drm/i915: Unconditionally do fb tracking invalidate in set_domain

[shuang.he at intel.com]

Tested-By: Intel Graphics QA PRTS (Patch Regression Test System Contact: shuang.he at intel.com)
Task id: 6556
-------------------------------------Summary-------------------------------------
Platform          Delta          drm-intel-nightly          Series Applied
ILK                                  303/303              303/303
SNB                                  312/316              312/316
IVB                                  343/343              343/343
BYT                                  286/286              286/286
-------------------------------------Detailed-------------------------------------
Platform  Test                                drm-intel-nightly          Series Applied
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