nimble/phy: Make sure wfr debug pin is properly disabled
nimble/phy: Make sure wfr debug pin is properly disabled

wfr debug pin should be disabled if:
- address is matched and we start receiving (CH4)
- timeout occurs (CH5)
- radio is disabled for any other reason (CH8)

X-Original-Commit: 892fc3760dd4b92802ab20d9fab239ca71922f7e

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