core: fix a possible crash when removing devices

core: fix a possible crash when removing devices

In probe_service, if the service already exists in device->services, it
returns the service. This might cause dev_probe and device_probe_profile
to add a duplicate service into device->services. When removing the
device, a double-free error might occur.

This patch changes the logic of probe_service so that the same service
will not be added to a device.

Signed-off-by: Anuj Jain <anuj01.jain@samsung.com>
Signed-off-by: Ayush Garg <ayush.garg@samsung.com>