bnx: Fix transmit hangs for 57766 and 57765 non-Ax chips

For the 57766 and 57765 non-Ax chips, the PCIe Fast Training Sequence
(FTS) value needs to setup to prevent transmit hangs.

Obtained-from: tg3
bnx: Improve 57766 performance by forcing 2K DMA size

Obtained-from: tg3