Fixing javadocs.

Change-Id: I9e6b3d7eb08d17d4ad450277a1279f6aaefd4640
diff --git a/src/main/java/org/onosproject/segmentrouting/IcmpHandler.java b/src/main/java/org/onosproject/segmentrouting/IcmpHandler.java
index 45fa794..3f333a4 100644
--- a/src/main/java/org/onosproject/segmentrouting/IcmpHandler.java
+++ b/src/main/java/org/onosproject/segmentrouting/IcmpHandler.java
@@ -58,7 +58,7 @@
      * If it is an ICMP packet to unknown host in a subnet, then sends an ARP request
      * to the subnet.
      *
-     * @param pkt
+     * @param pkt inbound packet
      */
     public void processPacketIn(InboundPacket pkt) {