netipmid: use the default system bus

The documentation says sd_bus_default_system() is preferred over
sd_bus_open_system() because all the calls to sd_bus_default_system()
will use the same resources, whereas the sd_bus_open_system() will
create a new connection and consume more resources for every call.

Change-Id: Ifc6a62cf9d35df3615d1133ef5c8f115ff462d98
Signed-off-by: Vernon Mauery <vernon.mauery@linux.intel.com>
1 file changed