From: Ian Campbell <icampbell@arcom.com>

Below is a patch to support the second 32-bit DATACS chipselect in the
smc91x driver to transfer data.  Support is enabled by adding a resource to
the platform device named 'smc91x-data32'.

My platform has a 16-bit chip select for the primary IO region and no DMA.
I found that throughput went from roughly 50mbit/s to 80mbit/s.  I tested
by throwing UDP packets at it using mgen (9000 packets/second with UDP
payload of 1472 bytes is roughly 100mbit/s, I think) and counting the
packets received in 60s, I then did the same for transmitting.  The
measurements are very rough but the improvement seems fairly significant to
me.

Patch was compiled for lubbock and neponset and compiled and tested on my
PXA platform.
Signed-off-by: Ian Campbell <icampbell@arcom.com>
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>