nimble/ll: Fix updating advertiser RPA on AUX_CONNECT_RSP
nimble/ll: Fix updating advertiser RPA on AUX_CONNECT_RSP

In adv_addr there is an address we shall use and not to try to decoded it
from rxbuf.
This patch fixes that.

This fixes HCI/CM/BV-04-C

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