drivers/net/tokenring/3c359.c: squish a warning

When dev_name() is changed to return `const char *':

drivers/net/tokenring/3c359.c: In function 'xl_probe':
drivers/net/tokenring/3c359.c:318: warning: assignment discards qualifiers from pointer target type

Cc: Jeff Garzik <jeff@garzik.org>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/net/tokenring/3c359.h

@@ -264,7 +264,7 @@ struct xl_private {
 	u16 asb;
 
 	u8 __iomem *xl_mmio;
-	char *xl_card_name;
+	const char *xl_card_name;
 	struct pci_dev *pdev ; 
 
 	spinlock_t xl_lock ;