qcacld-3.0: Fix cdp API null check in wma_is_pkt_drop_candidate()

Fix cdp API null check in wma_is_pkt_drop_candidate. Add check
if _last_received is greater than 0 before checking for DOS
attack.

Change-Id: Ic817e9a3d59100be5cb97f833985b7633391e1ca
CRs-Fixed: 1115648
1 file changed
tree: de1ea12a9db80512210600b7b5e29196f01c48ae
  1. core/
  2. uapi/
  3. Android.mk
  4. Kbuild
  5. Kconfig
  6. Makefile
  7. README.txt