drm/amdgpu: use drm_fb helper for console_(un)lock

This patch removes the usage of console_(un)lock
by replacing drm_fb_helper_set_suspend() to
drm_fb_helper_set_suspend_unlocked() which locks and
unlocks the console instead of locking ourselves.
Signed-off-by: Shirish S <shirish.s@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -2691,11 +2691,9 @@ int amdgpu_device_suspend(struct drm_device *dev, bool suspend, bool fbcon)
 			DRM_ERROR("amdgpu asic reset failed\n");
 	}
 
-	if (fbcon) {
-		console_lock();
+	if (fbcon)
 		amdgpu_fbdev_set_suspend(adev, 1);
-		console_unlock();
-	}
+
 	return 0;
 }
 
@@ -2780,9 +2778,7 @@ int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
 			}
 			drm_modeset_unlock_all(dev);
 		}
-		console_lock();
 		amdgpu_fbdev_set_suspend(adev, 0);
-		console_unlock();
 	}
 
 	drm_kms_helper_poll_enable(dev);

drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c

@@ -373,7 +373,7 @@ void amdgpu_fbdev_fini(struct amdgpu_device *adev)
 void amdgpu_fbdev_set_suspend(struct amdgpu_device *adev, int state)
 {
 	if (adev->mode_info.rfbdev)
-		drm_fb_helper_set_suspend(&adev->mode_info.rfbdev->helper,
+		drm_fb_helper_set_suspend_unlocked(&adev->mode_info.rfbdev->helper,
 						   state);
 }