af_ieee802154: provide dummy get/setsockopt

Provide dummt get/setsockopt implementations to stop these
syscalls from oopsing on our sockets.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
diff --git a/net/ieee802154/dgram.c b/net/ieee802154/dgram.c
index 14d3984..ba8b214 100644
--- a/net/ieee802154/dgram.c
+++ b/net/ieee802154/dgram.c
@@ -377,6 +377,18 @@
 	return ret;
 }
 
+static int dgram_getsockopt(struct sock *sk, int level, int optname,
+		    char __user *optval, int __user *optlen)
+{
+	return -EOPNOTSUPP;
+}
+
+static int dgram_setsockopt(struct sock *sk, int level, int optname,
+		    char __user *optval, int __user optlen)
+{
+	return -EOPNOTSUPP;
+}
+
 struct proto ieee802154_dgram_prot = {
 	.name		= "IEEE-802.15.4-MAC",
 	.owner		= THIS_MODULE,
@@ -391,5 +403,7 @@
 	.connect	= dgram_connect,
 	.disconnect	= dgram_disconnect,
 	.ioctl		= dgram_ioctl,
+	.getsockopt	= dgram_getsockopt,
+	.setsockopt	= dgram_setsockopt,
 };