Change the ibm-config flag to sync-mac

- As per the commit merged in phosphor-networkd, the ibm-config
  flag is now changed to sync-mac.

(From meta-ibm rev: 7bd9b4a226207205adf0093b7c64bc69f20ad1dc)

Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
Change-Id: Ia02e350ffa3ca42e56f3cac4b0dbc14980fab3b7
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/meta-ibm/recipes-phosphor/network/phosphor-network_%.bbappend b/meta-ibm/recipes-phosphor/network/phosphor-network_%.bbappend
index 76e440b..150d373 100644
--- a/meta-ibm/recipes-phosphor/network/phosphor-network_%.bbappend
+++ b/meta-ibm/recipes-phosphor/network/phosphor-network_%.bbappend
@@ -4,7 +4,7 @@
 SYSTEMD_SERVICE_${PN} += " ncsi-netlink.service"
 FILES_${PN} += "${datadir}/network/*.json"
 
-EXTRA_OECONF += "--enable-ibm-config"
+EXTRA_OECONF += "--enable-sync-mac"
 
 install_network_configuration(){
     install -d ${D}${systemd_system_unitdir}