crypto: qat - do not shadow error code

Do not shadow the return code from adf_dev_down() in the error path of
the DEV_DOWN command.
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: Adam Guerin <adam.guerin@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/intel/qat/qat_common/adf_sysfs.c

@@ -60,8 +60,8 @@ static ssize_t state_store(struct device *dev, struct device_attribute *attr,
 		}
 
 		ret = adf_dev_down(accel_dev, true);
-		if (ret < 0)
-			return -EINVAL;
+		if (ret)
+			return ret;
 
 		break;
 	case DEV_UP: