ieee820154: add pan_id setting support

This patch adds support for setting pan_id via nl802154 framework.
Adding a comment because setting 0xffff as pan_id seems to be valid
setting. The pan_id 0xffff as source pan is invalid. I am not sure now
about this setting but for the current netlink interface this is an
invalid setting, so we do the same now. Maybe we need to change that
when we have coordinator support and association support.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/ieee802154/rdev-ops.h b/net/ieee802154/rdev-ops.h
index 8a3b0eb..4115ea2 100644
--- a/net/ieee802154/rdev-ops.h
+++ b/net/ieee802154/rdev-ops.h
@@ -27,4 +27,11 @@
 	return rdev->ops->set_channel(&rdev->wpan_phy, page, channel);
 }
 
+static inline int
+rdev_set_pan_id(struct cfg802154_registered_device *rdev,
+		struct wpan_dev *wpan_dev, u16 pan_id)
+{
+	return rdev->ops->set_pan_id(&rdev->wpan_phy, wpan_dev, pan_id);
+}
+
 #endif /* __CFG802154_RDEV_OPS */