ath79: increase max tx ring buffer for ag71xx
This allows the user to specify a larger tx ring buffer size via ethtool.
Having symmetrical ring buffer sizes increases throughput on high bandwidth
(1 gbps tested) network connections.
The default value is not changed so the same behaviour is saved.
Signed-off-by: Robert Meijer <[email protected]>
[ improve title, commit description and wrap to 80 columns ]
Signed-off-by: Christian Marangi <[email protected]>
Robert Meijer