atl1: use netif_msg

Use netif_msg_* for console messages emitted by the driver. Add a
parameter to allow control of messaging at driver startup, and also
add the ability to control it with ethtool.
Signed-off-by: Jay Cliburn <jacliburn@bellsouth.net>
Acked-by: Chris Snook <csnook@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/atlx/atl1.h

@@ -794,7 +794,7 @@ struct atl1_adapter {
 	struct atl1_rrd_ring rrd_ring;
 	u64 hw_csum_err;
 	u64 hw_csum_good;
-
+	u32 msg_enable;
 	u16 imt;		/* interrupt moderator timer (2us resolution) */
 	u16 ict;		/* interrupt clear timer (2us resolution */
 	struct mii_if_info mii;	/* MII interface info */