nimble/controller: fix undefined result of << expression
nimble/controller: fix undefined result of << expression

X-Original-Commit: b1a15dc42777e9e69e285ec169396a2a8363da3f

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