RX_FIFO_THRESH
#define RX_FIFO_THRESH 5 /* Rx buffer level before first PCI xfer. */
#define RX_FIFO_THRESH 7 /* Rx buffer level before first PCI xfer. */
#define RX_FIFO_THRESH (7 << RXCFG_FIFO_SHIFT)
#define RX_FIFO_THRESH 7 /* Rx buffer level before first PCI xfer. */
#define RX_FIFO_THRESH 1 /* 0-3, 0==32, 64,96, or 3==128 bytes */