[netdrvr sis900] add suspend/resume support

[netdrvr sis900] add suspend/resume support

The attached patch adds support for suspend/resume to the sis900 driver.
With this patch on resume the NIC is fully configured and operational,
before a module reload was needed because of the complete lack of
suspend/resume callbacks.

I added two functions, sis900_suspend and sis900_resume, with their
pointers in struct pci_driver. A vector of 16 u32 was then needed to the
to keep PCI data during suspend. I added it in struct sis900_private.
I updated the revision number to reflect my changes.
Looking at the code I also killed three typos.

The patch doesn't touch any other code.

Since I don't know anything on ethernet drivers the rule 'works for me'
is fully valid.