Fix inappropriate use of set_bit in dl2k gige net driver

drivers/net/dl2k.c

@@ -1108,7 +1108,6 @@ set_multicast (struct net_device *dev)
 	u16 rx_mode = 0;
 	int i;
 	int bit;
-	int index, crc;
 	struct dev_mc_list *mclist;
 	struct netdev_private *np = dev->priv;
 	
@@ -1130,13 +1129,14 @@ set_multicast (struct net_device *dev)
 		for (i=0, mclist = dev->mc_list; mclist && i < dev->mc_count; 
 			i++, mclist=mclist->next) {
 
-			crc = ether_crc_le (ETH_ALEN, mclist->dmi_addr);
+			int index = 0;
+			int crc = ether_crc_le (ETH_ALEN, mclist->dmi_addr);
 
 			/* The inverted high significant 6 bits of CRC are
 			   used as an index to hashtable */
-			for (index = 0, bit = 0; bit < 6; bit++)
-				if (test_bit(31 - bit, &crc))
-					set_bit(bit, &index);
+			for (bit = 0; bit < 6; bit++)
+				if (crc & (1 << (31 - bit)))
+					index |= (1 << bit);
 
 			hash_table[index / 32] |= (1 << (index % 32));
 		}