For patent issue need to remove TxStartThresh and RxEarlyThresh.  This patent
is cut-through patent.  If use this function, Tx will start to transmit after
few data be move in to Tx FIFO.  We are not allow to use those function in
DFE530/DFE550/DFE580/DL10050/IP100/IP100A.  It will decrease a little
performance.
Signed-off-by: Jesse Huang <jesse@icplus.com.tw>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>