[Intel-gfx] [PATCH] drm/i915: Make for_each_intel_* macros typesafe

[shuang.he at intel.com]

Tested-By: PRC QA PRTS (Patch Regression Test System Contact: shuang.he at intel.com)
Task id: 5954
-------------------------------------Summary-------------------------------------
Platform          Delta          drm-intel-nightly          Series Applied
PNV                                  268/268              268/268
ILK                 -1              303/303              302/303
SNB                                  283/283              283/283
IVB                                  342/342              342/342
BYT                                  287/287              287/287
HSW                 -1              363/363              362/363
BDW                                  308/308              308/308
-------------------------------------Detailed-------------------------------------
Platform  Test                                drm-intel-nightly          Series Applied
*ILK  igt_gem_fenced_exec_thrash_no-spare-fences-busy      PASS(2)      DMESG_WARN(1)PASS(1)
*HSW  igt_gem_storedw_loop_vebox      PASS(2)      DMESG_WARN(1)PASS(1)
Note: You need to pay more attention to line start with '*'