DPDK: increase max packet size from 9160B to 9kB.

Packet size is passed to the ixgbe driver as a buffer
size. Then it is calculated to get the buffer size in kilobytes
using right bitshift by 10. 9160 >> 10 is 8. This leads to truncating
incoming 9kB frames to 8kB. Changing packet size to integer multiple
of 1kB solves the problem.

Change-Id: I202c7f9430c5952b5e89b1ef9fff101ed36bfe82
Closes-bug: #1547782

include/vr_dpdk.h

@@ -111,7 +111,7 @@ extern unsigned int vr_flow_hold_limit;
 /* Maximum number of bond interfaces per lcore */
 #define VR_DPDK_MAX_BONDS           2
 /* Max size of a single packet */
-#define VR_DPDK_MAX_PACKET_SZ       9160
+#define VR_DPDK_MAX_PACKET_SZ       9 * 1024
 /* Number of bytes needed for each mbuf */
 #define VR_DPDK_MBUF_SZ             (VR_DPDK_MAX_PACKET_SZ      \
                                     + sizeof(struct rte_mbuf)   \