hwc: let virtual display still shows under power off mode

Virtual display may need to show something even under power off mode
(e.g. inform user that connection is still there, just device suspend)

bug: 28575438
Change-Id: I5796802579d0b364e10fed8611b38ba2150bf9e7
Signed-off-by: Marvin <marvin_tsai@htc.com>
diff --git a/msm8996/sdm/libs/hwc/hwc_session.cpp b/msm8996/sdm/libs/hwc/hwc_session.cpp
index 7928765..4bc25c0 100644
--- a/msm8996/sdm/libs/hwc/hwc_session.cpp
+++ b/msm8996/sdm/libs/hwc/hwc_session.cpp
@@ -459,11 +459,6 @@
   if (hwc_session->hwc_display_[disp]) {
     status = hwc_session->hwc_display_[disp]->SetPowerMode(mode);
   }
-  if (disp == HWC_DISPLAY_PRIMARY && hwc_session->hwc_display_[HWC_DISPLAY_VIRTUAL]) {
-    // Set the power mode for virtual display while setting power mode for primary, as SF
-    // does not invoke SetPowerMode() for virtual display.
-    status = hwc_session->hwc_display_[HWC_DISPLAY_VIRTUAL]->SetPowerMode(mode);
-  }
 
   return status;
 }