batman-adv: correct several typ0s in the comments

Several typos have been corrected and some sentences have been rephrased

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index 3e2f91f..6ba35a27 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -532,7 +532,7 @@
 	if (!is_valid_ether_addr(addr->sa_data))
 		return -EADDRNOTAVAIL;
 
-	/* only modify transtable if it has been initialised before */
+	/* only modify transtable if it has been initialized before */
 	if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) {
 		tt_local_remove(bat_priv, dev->dev_addr,
 				"mac address changed", false);