qcacld-3.0: Fix passing invalid ipa iface

Currently in net dev cleanup of ipa host interface if the
ipa interface does not exist for that particular net dev,
last ipa iface reference is passed. This may lead to invalid
access. So fix by validating the iface context before clean
up of host ipa interface.

Change-Id: I753c922b5c82c676a318df87552051fdd74c983c
CRs-Fixed: 2632382
1 file changed