nimble/controller: Fix length for advertising report HCI event
nimble/controller: Fix length for advertising report HCI event

X-Original-Commit: 15445662f3c9413ae11733f78a6033dfcdee59d0

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