netxen: firmware download improvements

o set port mode after resetting device.
o prefer cut-through firmware (doesn't require on-card memory).
o load flashed firmware if newer.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 files changed