staging: octeon-ethernet: eliminate DONT_WRITEBACK

This feature is not used so eliminate it.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/octeon/ethernet-defines.h
Simple merge

diff --cc drivers/staging/octeon/ethernet-mem.c
Simple merge

diff --cc drivers/staging/octeon/ethernet-rx.c
Simple merge

diff --cc drivers/staging/octeon/ethernet-tx.c
Simple merge

diff --cc drivers/staging/octeon/ethernet.c
Simple merge