The kernel-doc script identified several documentation issues in
components/coap, so fix them.
Change-Id: Iec06bb65071e4d9b1ee8787da84e66ba4ffb0028
CRs-Fixed: 3352334
Add component for the Constrained Application Protocol.
This component provides interfaces to enable/disable
offload reply/periodic transmitting for CoAP messages,
and also the interface for fetching CoAP messages those
been cached during offload processing.
Change-Id: I91397f598c2702a63e250d50641352d13117777e
CRs-Fixed: 3254535