nimble/controller: Add support for sending AUX_SCAN_RSP
nimble/controller: Add support for sending AUX_SCAN_RSP

If AUX_SCAN_REQ is received then reply with AUX_SCAN_RSP.

X-Original-Commit: bb8d1aab0142d3fe9bb8746548a854ea2ba6131f

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