Implement configuration of NTP server support

Change-Id: I8d471dbc6ea7ec62cbcc157565a7b39cd5031caa
Signed-off-by: Ratan Gupta <ratagupt@in.ibm.com>
diff --git a/util.hpp b/util.hpp
index 429b213..669c68f 100644
--- a/util.hpp
+++ b/util.hpp
@@ -60,6 +60,9 @@
 }//namespace internal
 }//namespace mac_address
 
+constexpr auto networkdService = "systemd-networkd.service";
+constexpr auto timeSynchdService = "systemd-timesyncd.service";
+
 /* @brief converts the given subnet into prefix notation.
  * @param[in] addressFamily - IP address family(AF_INET/AF_INET6).
  * @param[in] mask - Subnet Mask.