Currently driver does not caches peer nss and it needs this info
for big data stats. When driver receives big data stats command
it always returns nss as 0 which is not correct.
To address above issue, add support to cache peer nss in SAP
mode.
Change-Id: I5152581d7d66b5bf20f6102dcb9edaa4e23b35bc
CRs-Fixed: 3174420