[Intel-gfx] [PATCH 5/5] drm/i915: Drop unused position fields (v2)

[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                                  363/364              363/364
ILK                 -1              364/366              363/366
SNB                 -2              447/450              445/450
IVB                 -2              496/498              494/498
BYT                                  288/289              288/289
HSW                 -1              562/564              561/564
BDW                                  415/417              415/417
-------------------------------------Detailed-------------------------------------
Platform  Test                                drm-intel-nightly          Series Applied
*ILK  igt_gem_reloc_vs_gpu_forked-faulting-reloc-thrash-inactive      PASS(2, M37)      DMESG_WARN(1, M37)
*SNB  igt_kms_mmio_vs_cs_flip_setplane_vs_cs_flip      PASS(2, M35)      DMESG_WARN(1, M35)
*SNB  igt_kms_rotation_crc_sprite-rotation      PASS(2, M35)      DMESG_WARN(1, M35)
*IVB  igt_kms_mmio_vs_cs_flip_setplane_vs_cs_flip      PASS(2, M34)      DMESG_WARN(1, M34)
*IVB  igt_kms_rotation_crc_sprite-rotation      PASS(2, M34)      DMESG_WARN(1, M34)
*HSW  igt_kms_mmio_vs_cs_flip_setplane_vs_cs_flip      PASS(2, M40)      DMESG_WARN(1, M40)
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