e1000e: provide MAC-family-specific function to set LAN ID

Provide MAC-specific function pointer to determine the LAN ID (PCI func).
The LAN ID is used internally by the driver to determine which h/w lock
to use to protect accessing the PHY on ESB2 as well as help to determine
the alternate MAC address on some parts.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/e1000e/hw.h b/drivers/net/e1000e/hw.h
index 127e6a2..9cac5d9 100644
--- a/drivers/net/e1000e/hw.h
+++ b/drivers/net/e1000e/hw.h
@@ -749,6 +749,7 @@
 	void (*clear_hw_cntrs)(struct e1000_hw *);
 	void (*clear_vfta)(struct e1000_hw *);
 	s32  (*get_bus_info)(struct e1000_hw *);
+	void (*set_lan_id)(struct e1000_hw *);
 	s32  (*get_link_up_info)(struct e1000_hw *, u16 *, u16 *);
 	s32  (*led_on)(struct e1000_hw *);
 	s32  (*led_off)(struct e1000_hw *);