batman-adv: convert time_after instances to has_timed_out

To increase readability the has_timed_out() functions has been introduced.
This patch converts existing time_after() calls to use this wrapper
function (if applicable).
This patch also converts all timeouts to miliseconds to be consistent.

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
index 847ff7e..1161f27 100644
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -282,8 +282,7 @@
 	hlist_for_each_entry_safe(neigh_node, node, node_tmp,
 				  &orig_node->neigh_list, list) {
 
-		if ((time_after(jiffies,
-			neigh_node->last_valid + PURGE_TIMEOUT * HZ)) ||
+		if ((has_timed_out(neigh_node->last_valid, PURGE_TIMEOUT)) ||
 		    (neigh_node->if_incoming->if_status == IF_INACTIVE) ||
 		    (neigh_node->if_incoming->if_status == IF_NOT_IN_USE) ||
 		    (neigh_node->if_incoming->if_status == IF_TO_BE_REMOVED)) {
@@ -327,9 +326,7 @@
 {
 	struct neigh_node *best_neigh_node;
 
-	if (time_after(jiffies,
-		orig_node->last_valid + 2 * PURGE_TIMEOUT * HZ)) {
-
+	if (has_timed_out(orig_node->last_valid, 2 * PURGE_TIMEOUT)) {
 		bat_dbg(DBG_BATMAN, bat_priv,
 			"Originator timeout: originator %pM, last_valid %lu\n",
 			orig_node->orig, (orig_node->last_valid / HZ));
@@ -372,8 +369,8 @@
 				continue;
 			}
 
-			if (time_after(jiffies, orig_node->last_frag_packet +
-						msecs_to_jiffies(FRAG_TIMEOUT)))
+			if (has_timed_out(orig_node->last_frag_packet,
+					  FRAG_TIMEOUT))
 				frag_list_free(&orig_node->frag_list);
 		}
 		spin_unlock_bh(list_lock);