[Intel-gfx] [PATCH] drm/i915: Align initial plane backing objects correctly

[shuang.he at intel.com]

Tested-By: PRC QA PRTS (Patch Regression Test System Contact: shuang.he at intel.com)
Task id: 5755
-------------------------------------Summary-------------------------------------
Platform          Delta          drm-intel-nightly          Series Applied
PNV                 -1              275/275              274/275
ILK                 -2              310/310              308/310
SNB              +2                 320/346              322/346
IVB                 -2              380/380              378/380
BYT                                  296/296              296/296
HSW              +3-1              422/428              424/428
BDW                                  318/333              318/333
-------------------------------------Detailed-------------------------------------
Platform  Test                                drm-intel-nightly          Series Applied
*PNV  igt_gem_tiled_pread_pwrite      PASS(5, M7)      FAIL(1, M7)
 ILK  igt_drv_suspend_fence-restore-tiled2untiled      DMESG_WARN(3, M26)PASS(1, M26)      DMESG_WARN(1, M26)
*ILK  igt_kms_flip_rcs-flip-vs-panning      PASS(2, M26)      DMESG_WARN(1, M26)
*SNB  igt_kms_flip_bo-too-big      BLACKLIST(1, M35)      PASS(1, M35)
*SNB  igt_kms_flip_bo-too-big-interruptible      BLACKLIST(1, M35)      PASS(1, M35)
*IVB  igt_gem_pwrite_pread_display-copy-performance      PASS(2, M4)      DMESG_WARN(1, M4)
*IVB  igt_gem_storedw_batches_loop_secure-dispatch      PASS(3, M4)      DMESG_WARN(1, M4)
*HSW  igt_gem_storedw_loop_vebox      PASS(2, M40)      DMESG_WARN(1, M40)
*HSW  igt_kms_flip_bo-too-big      BLACKLIST(1, M40)      PASS(1, M40)
*HSW  igt_kms_flip_bo-too-big-interruptible      BLACKLIST(1, M40)      PASS(1, M40)
 HSW  igt_kms_flip_plain-flip-fb-recreate-interruptible      TIMEOUT(6, M40)PASS(5, M40)      PASS(1, M40)
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