net: lwm2m: add set_socketoptions cb to pull context LwM2M context

The pull context LwM2M client's set_socketoptions callback is currently
unused and can't be set by a user. Add a public API to set the
pull context's client's set_socketoptions callback.

Signed-off-by: Andi Gerl <andi.gerl@exacttechnology.com>
2 files changed