[Intel-gfx] [PATCH 9/9] drm/i915: Don't store current shared DPLL

[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=271/271->271/271
PNV: pass/total=331/331->328/331
ILK: pass/total=271/271->271/271
IVB: pass/total=271/271->271/271
SNB: pass/total=271/271->271/271
HSW: pass/total=271/271->271/271
BDW: pass/total=368/368->366/368
-------------------------------------Detailed-------------------------------------
test_platform: test_suite, test_case, result_with_drm_intel_nightly->result_with_patch_applied
PNV: Intel_gpu_tools, igt_gem_concurrent_blit_cpu-bcs-gpu-read-after-write-interruptible, PASS->DMESG_WARN
PNV: Intel_gpu_tools, igt_kms_setmode_invalid-clone-exclusive-crtc, PASS->DMESG_WARN
PNV: Intel_gpu_tools, igt_kms_setmode_invalid-clone-single-crtc, PASS->DMESG_WARN
BDW: Intel_gpu_tools, igt_gem_concurrent_blit_gtt-bcs-gpu-read-after-write-forked, PASS->TIMEOUT
BDW: Intel_gpu_tools, igt_gem_concurrent_blit_gttX-bcs-gpu-read-after-write-forked, PASS->TIMEOUT