[Intel-gfx] [PATCH] drm/i915/audio: fix monitor presence indication

[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=290/290->290/290
PNV: pass/total=362/362->362/362
ILK: pass/total=381/381->380/381
IVB: pass/total=522/559->521/559
SNB: pass/total=444/444->444/444
HSW: pass/total=595/595->595/595
BDW: pass/total=436/436->436/436
-------------------------------------Detailed-------------------------------------
test_platform: test_suite, test_case, result_with_drm_intel_nightly(count, machine_id...)...->result_with_patch_applied(count, machine_id)...
ILK: Intel_gpu_tools, igt_kms_flip_flip-vs-modeset-vs-hang-interruptible, DMESG_WARN(2, M26M37)PASS(5, M37M26) -> DMESG_WARN(1, M37)PASS(3, M37)
IVB: Intel_gpu_tools, igt_kms_cursor_crc_cursor-64x64-offscreen, PASS(4, M21) -> DMESG_WARN(1, M21)PASS(3, M21)