peer.h: include 'dtls_config.h' to have 'DTLS_PEERS_NOHASH' defined

In contiki mode, without this 'peer.c' does not take the configuration into
account and 'dtls.c' and 'peer.c' have a different 'dtls_peer_t' definition.

Change-Id: I084b580bb1173a2bbf7f3a95d65b364b59706094
Signed-off-by: Gaëtan Harter <gaetan.harter@inria.fr>
1 file changed