[ipq806x] Fix for mac address look up issue

Add support to look up in neighbour discovery table for neighbour entry,
if not found, look in route table

CRs-Fixed: 543364

Change-Id: I1445efe80ec096685556ace3802186610d5399f4
Signed-off-by: Pamidipati, Vijay <vpamidip@codeaurora.org>
Reviewed-by: Abhishek Rastogi <arastogi@codeaurora.org>
2 files changed