[Intel-gfx] [PATCH] drm/i915: add missing rpm ref to

[shuang.he at intel.com]

Tested-By: PRC QA PRTS (Patch Regression Test System Contact: shuang.he at intel.com)
-------------------------------------Summary-------------------------------------
Platform: baseline_drm_intel_nightly_pass_rate->patch_applied_pass_rate
BYT: pass/total=291/291->290/291
PNV: pass/total=356/356->356/356
ILK: pass/total=372/372->371/372
IVB: pass/total=545/546->543/546
SNB: pass/total=380/380->379/380
HSW: pass/total=579/579->579/579
BDW: pass/total=422/423->422/423
-------------------------------------Detailed-------------------------------------
test_platform: test_suite, test_case, result_with_drm_intel_nightly(count, machine_id...)...->result_with_patch_applied(count, machine_id)...
BYT: Intel_gpu_tools, igt_kms_setmode_invalid-clone-single-crtc, TIMEOUT(9, M36M31)PASS(1, M31) -> TIMEOUT(1, M31)PASS(3, M31)
ILK: Intel_gpu_tools, igt_kms_setmode_invalid-clone-single-crtc, FAIL(2, M26)DMESG_FAIL(1, M26)TIMEOUT(13, M37M6M26)PASS(1, M26) -> TIMEOUT(1, M37)PASS(3, M37)
IVB: Intel_gpu_tools, igt_gem_bad_reloc_negative-reloc, NSPT(5, M21M34)PASS(8, M34M21) -> NSPT(1, M21)PASS(3, M21)
IVB: Intel_gpu_tools, igt_kms_cursor_crc_cursor-128x128-sliding, PASS(4, M21) -> DMESG_WARN(1, M21)PASS(3, M21)
IVB: Intel_gpu_tools, igt_kms_cursor_crc_cursor-64x64-offscreen, PASS(4, M21) -> DMESG_WARN(1, M21)PASS(3, M21)
IVB: Intel_gpu_tools, igt_kms_setmode_invalid-clone-single-crtc, TIMEOUT(12, M34M21)PASS(1, M21) -> TIMEOUT(1, M21)PASS(3, M21)
SNB: Intel_gpu_tools, igt_kms_setmode_invalid-clone-single-crtc, TIMEOUT(18, M35M22)PASS(1, M35) -> TIMEOUT(1, M22)PASS(3, M22)
BDW: Intel_gpu_tools, igt_gem_reset_stats_ban-bsd, DMESG_WARN(1, M28)PASS(15, M42M30M28) -> PASS(4, M42)
BDW: Intel_gpu_tools, igt_kms_setmode_invalid-clone-single-crtc, TIMEOUT(15, M42M30M28)PASS(1, M28) -> TIMEOUT(1, M42)PASS(3, M42)