drm/amdgpu: drop extra runtime pm handling in resume pmop

The core handles this for us.
Acked-by: NEvan Quan <evan.quan@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

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

@@ -1173,14 +1173,6 @@ static int amdgpu_pmops_suspend(struct device *dev)
 static int amdgpu_pmops_resume(struct device *dev)
 {
 	struct drm_device *drm_dev = dev_get_drvdata(dev);
-	struct amdgpu_device *adev = drm_dev->dev_private;
-
-	/* GPU comes up enabled by the bios on resume */
-	if (adev->runpm) {
-		pm_runtime_disable(dev);
-		pm_runtime_set_active(dev);
-		pm_runtime_enable(dev);
-	}
 
 	return amdgpu_device_resume(drm_dev, true);
 }