[WCNCR00164404] cert: Fix TGn-4.2.25 softap forwarding fail in USB

[Description]
Fix TGn-4.2.25 softap forwarding fail in USB.
Root cause: PP will stop sending MSDU_ID packet to CR4 when host stops
            receiving Rx data packets. That causes a dead lock.
Solution:
  - Enlarge SW RFB size.
  - Driver discard USB Rx packets when out-of-SW-RFB situation continues

Change-Id: I5e31f31daea279d74e6951a2c38bd2c66f134ceb
Signed-off-by: Desmond Lin <desmond.lin@mediatek.com>
CR-Id: WCNCR00164404
Feature: cert
2 files changed