nimble/controller: Emit build error when building with non-32kHz clock
nimble/controller: Emit build error when building with non-32kHz clock

X-Original-Commit: cdf566d3747ec6f50fc5c0ecfb10d357bc1da2be

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