sky2: reorganize chip revision features

This patch should cause no functional changes in driver behaviour.
There are (too) many revisions of the Yukon 2 chip now. Instead of
adding more conditionals based on chip revision; rerganize into a
set of feature flags so adding new versions is less problematic.
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/sky2.h

@@ -2040,6 +2040,15 @@ struct sky2_hw {
 	void __iomem  	     *regs;
 	struct pci_dev	     *pdev;
 	struct net_device    *dev[2];
+	unsigned long	     flags;
+#define SKY2_HW_USE_MSI		0x00000001
+#define SKY2_HW_FIBRE_PHY	0x00000002
+#define SKY2_HW_GIGABIT		0x00000004
+#define SKY2_HW_NEWER_PHY	0x00000008
+#define SKY2_HW_RAMBUFFER	0x00000010	/* chip has RAM FIFO */
+#define SKY2_HW_NEW_LE		0x00000020	/* new LSOv2 format */
+#define SKY2_HW_AUTO_TX_SUM	0x00000040	/* new IP decode for Tx */
+#define SKY2_HW_ADV_POWER_CTL	0x00000080	/* additional PHY power regs */
 
 	u8	     	     chip_id;
 	u8		     chip_rev;
@@ -2053,13 +2062,12 @@ struct sky2_hw {
 
 	struct timer_list    watchdog_timer;
 	struct work_struct   restart_work;
-	int		     msi;
 	wait_queue_head_t    msi_wait;
 };
 
 static inline int sky2_is_copper(const struct sky2_hw *hw)
 {
-	return !(hw->pmd_type == 'L' || hw->pmd_type == 'S' || hw->pmd_type == 'P');
+	return !(hw->flags & SKY2_HW_FIBRE_PHY);
 }
 
 /* Register accessor for memory mapped device */