atm: use const where reasonable

From: Mitchell Blank Jr <mitch@sfgoth.com>

Signed-off-by: Chas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/atm/lec.h b/net/atm/lec.h
index b41cda7..0d37668 100644
--- a/net/atm/lec.h
+++ b/net/atm/lec.h
@@ -42,12 +42,12 @@
  *
  */
 struct lane2_ops {
-	int (*resolve) (struct net_device *dev, u8 *dst_mac, int force,
+	int (*resolve) (struct net_device *dev, const u8 *dst_mac, int force,
 			u8 **tlvs, u32 *sizeoftlvs);
-	int (*associate_req) (struct net_device *dev, u8 *lan_dst,
-			      u8 *tlvs, u32 sizeoftlvs);
-	void (*associate_indicator) (struct net_device *dev, u8 *mac_addr,
-				     u8 *tlvs, u32 sizeoftlvs);
+	int (*associate_req) (struct net_device *dev, const u8 *lan_dst,
+			      const u8 *tlvs, u32 sizeoftlvs);
+	void (*associate_indicator) (struct net_device *dev, const u8 *mac_addr,
+				     const u8 *tlvs, u32 sizeoftlvs);
 };
 
 /*