few tests - dmesg-warn/dmesg-fail - Unknown revid

http://gfx-ci.igk.intel.com/cibuglog-ng/testresult/1496697591?query_key=a36c6aae251f2cc1a45b79d0863b5e3300eceb5c

<7> [72.907598] i915 0000:03:00.0: [drm:intel_modeset_verify_disabled [i915]] [ENCODER:274:DP-MST C]
<7> [72.907685] i915 0000:03:00.0: [drm:intel_modeset_verify_disabled [i915]] [ENCODER:275:DP-MST D]
<7> [72.907771] i915 0000:03:00.0: [drm:verify_connector_state [i915]] [CONNECTOR:236:DP-5]
<7> [72.907868] i915 0000:03:00.0: [drm:verify_connector_state [i915]] [CONNECTOR:255:HDMI-A-6]
<7> [72.908004] i915 0000:03:00.0: [drm:gen9_dbuf_slices_update [i915]] Updating dbuf slices to 0x3
<7> [72.908218] i915 0000:03:00.0: [drm:gen9_dbuf_slices_update [i915]] Updating dbuf slices to 0x1
<7> [72.908431] i915 0000:03:00.0: [drm:intel_modeset_verify_crtc [i915]] [CRTC:80:pipe A]
<7> [72.908666] i915 0000:03:00.0: [drm:intel_modeset_verify_crtc [i915]] [CRTC:131:pipe B]
<7> [72.936836] intel_gt_set_wedged called from intel_gt_set_wedged_on_fini+0xd/0x30 [i915]
<7> [73.007965] i915 0000:03:00.0: [drm:drm_client_release] drm_fb_helper
<7> [73.354254] [IGT] core_hotunplug: rebinding the driver to the device
<4> [73.354412] i915 0000:03:00.0: [drm] Unknown revid 0x01
<7> [73.354415] i915 0000:03:00.0: [drm:intel_step_init [i915]] Using future steppings
<7> [73.354986] i915 0000:03:00.0: [drm:intel_gt_common_init_early [i915]] WOPCM: 2048K
<7> [73.355100] i915 0000:03:00.0: [drm:intel_uc_init_early [i915]] GT0: enable_guc=3 (guc:yes submission:yes huc:yes slpc:yes)
<7> [73.355236] i915 0000:03:00.0: [drm:intel_gt_probe_all [i915]] GT0: Setting up Primary GT
<7> [73.355569] i915 0000:03:00.0: [drm:i915_driver_probe [i915]] rawclk rate: 38400 kHz
<7> [73.355673] i915 0000:03:00.0: [drm:intel_engines_init_mmio [i915]] vdbox enable: 0005, instances: 0005
<7> [73.355742] i915 0000:03:00.0: [drm:intel_engines_init_mmio [i915]] vebox enable: 0003, instances: 0003
<7> [73.355807] i915 0000:03:00.0: [drm:intel_engines_init_mmio [i915]] ccs0 fused off
<7> [73.355870] i915 0000:03:00.0: [drm:intel_engines_init_mmio [i915]] ccs3 fused off
<7> [73.356750] i915 0000:03:00.0: [drm:i915_ggtt_probe_hw [i915]] GGTT size = 4096M