Phonet: Phonet datagram transport protocol

This provides the basic SOCK_DGRAM transport protocol for Phonet.

Signed-off-by: Remi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/phonet/Makefile b/net/phonet/Makefile
index c1d671d..d218abc 100644
--- a/net/phonet/Makefile
+++ b/net/phonet/Makefile
@@ -4,4 +4,5 @@
 	pn_dev.o \
 	pn_netlink.o \
 	socket.o \
+	datagram.o \
 	af_phonet.o