BLE Host - Enable data-length-change event by dflt
BLE Host - Enable data-length-change event by dflt

X-Original-Commit: a96152c317148be63c4e0f36d259841716ebe67c

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