Standardization of some function headers.

net/route/net_del_fileroute.c

@@ -89,7 +89,7 @@ struct route_match_ipv6_s
  * Description:
  *   Return 1 if the route is available
  *
- * Parameters:
+ * Input Parameters:
  *   route - The next route to examine
  *   arg   - The match values (cast to void*)
  *
@@ -178,7 +178,7 @@ static int net_match_ipv6(FAR struct net_route_ipv6_s *route, FAR void *arg)
  * Description:
  *   Remove an existing route from the routing table
  *
- * Parameters:
+ * Input Parameters:
  *
  * Returned Value:
  *   OK on success; Negated errno on failure.