(resend)

Identify different firmware by enums, not strings, as we need to have
some integral firmware identifier for choosing maximum rssi values for
each different firmware type.  Consolidate the information about
firmware filenames and capabilities in the atmel module, not in atmel_cs
or atmel_pci.  Move common prototypes and firmware enum into new atmel.h
file.  The atmel_cs driver also thought that init_atmel_card() took "int
irq" as the first parameter, this is now fixed to be "unsigned short
irq".
Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>