vmxnet3: enable promiscuous mode

Some L2 traffic requires promiscuous mode enable on the interface

Change-Id: Icbb2792aaf0d9d1c51373e46ae5049ff0d986863
Signed-off-by: Steven <sluong@cisco.com>
diff --git a/src/plugins/vmxnet3/vmxnet3.c b/src/plugins/vmxnet3/vmxnet3.c
index f60a8fe..ec316c8 100644
--- a/src/plugins/vmxnet3/vmxnet3.c
+++ b/src/plugins/vmxnet3/vmxnet3.c
@@ -185,7 +185,7 @@
   shared->interrupt.event_intr_index = 1;
   shared->interrupt.control = VMXNET3_IC_DISABLE_ALL;
   shared->rx_filter.mode = VMXNET3_RXMODE_UCAST | VMXNET3_RXMODE_BCAST |
-    VMXNET3_RXMODE_ALL_MULTI;
+    VMXNET3_RXMODE_ALL_MULTI | VMXNET3_RXMODE_PROMISC;
   shared_dma = vmxnet3_dma_addr (vm, vd, shared);
 
   vmxnet3_reg_write (vd, 1, VMXNET3_REG_DSAL, shared_dma);