oniro-packageconfig.inc: Fix syntax overrides

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

meta-oniro-core/conf/distro/include/oniro-packageconfig.inc

@@ -3,11 +3,11 @@
 # SPDX-License-Identifier: Apache-2.0
 
 # Define the configuration set as per our distro policy
-PACKAGECONFIG_pn-networkmanager = "nss systemd bluez5 wifi"
+PACKAGECONFIG:pn-networkmanager = "nss systemd bluez5 wifi"
 
 # We have no use for dlt-daemon as we use systemd for logging
-PACKAGECONFIG_remove_pn-mosquitto = "dlt"
+PACKAGECONFIG:remove:pn-mosquitto = "dlt"
 
 # We use NetworkManager as the default network manager (included in our
 # reference images).
-PACKAGECONFIG_remove_pn-systemd = "networkd"
+PACKAGECONFIG:remove:pn-systemd = "networkd"