[qca-nss-ecm] Fix neighbour solicitation send function.

dst_ops->neigh_lookup function pointer is set to the
ip6_neigh_lookup function. This function returns an
error pointer with the ERR_PTR() macro. So, we should
check the return value of this function pointer with
the IS_ERR() macro.

Change-Id: I188a6e53278faaa68f1854524f612efc1f7451fe
Signed-off-by: Murat Sezgin <msezgin@codeaurora.org>
1 file changed