This option was there for debugging race conditions,
just remove it, and assume TX_FLOW is always enabled.
Signed-off-by: NMike Sinkovsky <msink@permonline.ru>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Based on original driver from chip manufacturer, but nearly full rewite.
Tested and used in production with Blackfin BF531 embedded processor.
Signed-off-by: NMike Sinkovsky <msink@permonline.ru>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>