BLE Host - Nack unexpected LTK reqs from ctlr.
BLE Host - Nack unexpected LTK reqs from ctlr.

X-Original-Commit: a5f37f296655c4022cd29118b800198ec2f8231a

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