nimble/ll: Fix RxAdd in AUX_CONNECT_RSP
nimble/ll: Fix RxAdd in AUX_CONNECT_RSP

We put TxAdd bit instead of RxAdd bit so connections failed in case we
used public address and remote used random address.

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