crypto: qat - fix a signedness bug in get_service_enabled()

The "ret" variable needs to be signed or there is an error message which
will not be printed correctly.

Fixes: 0cec19c7 ("crypto: qat - add support for compression for 4xxx")
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NGiovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/qat/qat_4xxx/adf_4xxx_hw_data.c

@@ -52,7 +52,7 @@ static const char *const dev_cfg_services[] = {
 static int get_service_enabled(struct adf_accel_dev *accel_dev)
 {
 	char services[ADF_CFG_MAX_VAL_LEN_IN_BYTES] = {0};
-	u32 ret;
+	int ret;
 
 	ret = adf_cfg_get_param_value(accel_dev, ADF_GENERAL_SEC,
 				      ADF_SERVICES_ENABLED, services);