This change helps BCM4908 SoC. It was capable of 940 Mb/s masq NAT while
using iperf but users reported lower & unstable speeds for HTTP based
tests.
For LibreSpeed tests this bumps NAT speed from ~930 Mb/s to ~990 Mb/s
(not that this value seems real but speed bump definitely is).
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
829cc60a28