usteer: add BSSID to node struct

Add the node BSSID to the usteer_node struct. This will be helpful in
the future when evaluating beacon reports from STAs.

Signed-off-by: David Bauer <mail@david-bauer.net>

ubus.c

@@ -275,6 +275,7 @@ void usteer_dump_node(struct blob_buf *buf, struct usteer_node *node)
 	void *c;
 
 	c = blobmsg_open_table(buf, usteer_node_name(node));
+	blobmsg_printf(buf, "bssid", MAC_ADDR_FMT, MAC_ADDR_DATA(node->bssid));
 	blobmsg_add_u32(buf, "freq", node->freq);
 	blobmsg_add_u32(buf, "n_assoc", node->n_assoc);
 	blobmsg_add_u32(buf, "noise", node->noise);