cnic: Use pfid for internal memory offsets.

The pfid (physical function ID) is the same as PCI function on production
devices.  The pfid for future devices will be different and will be used
for internal memory offsets.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/cnic.h

@@ -272,6 +272,7 @@ struct cnic_local {
 
 	u32			chip_id;
 	int			func;
+	u32			pfid;
 	u32			shmem_base;
 
 	u32			uio_dev;