nimble/ll: Stop advertising properly after limit occured
nimble/ll: Stop advertising properly after limit occured

We should do full SM stop after duration of max events limit occured to
make sure there is nothing left in scheduler or queues.

apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble