spi: fsl-espi: simplify of_fsl_espi_suspend

Simplify of_fsl_espi_suspend a little.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-fsl-espi.c

@@ -783,11 +783,7 @@ static int of_fsl_espi_suspend(struct device *dev)
 		return ret;
 	}
 
-	ret = pm_runtime_force_suspend(dev);
-	if (ret < 0)
-		return ret;
-
-	return 0;
+	return pm_runtime_force_suspend(dev);
 }
 
 static int of_fsl_espi_resume(struct device *dev)