drm/amdgpu: reset runpm flag if device suspend fails

If device suspend fails when we attempt to runtime suspend,
reset the runpm flag.
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

@@ -1350,8 +1350,10 @@ static int amdgpu_pmops_runtime_suspend(struct device *dev)
 		drm_dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
 
 	ret = amdgpu_device_suspend(drm_dev, false);
-	if (ret)
+	if (ret) {
+		adev->in_runpm = false;
 		return ret;
+	}
 
 	if (amdgpu_device_supports_atpx(drm_dev)) {
 		/* Only need to handle PCI state in the driver for ATPX