net: mgmt: Silently ignore net_mgmt_event functions if not enabled

When CONFIG_NET_MGMT_EVENT is not set, it will still be able to compile
code using net_mgmt_event related functions.

Change-Id: I6824c57093636867ea4228338aa6c02913975510
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
1 file changed