pasemi_mac: fix typo

Add missing &:

drivers/net/pasemi_mac.c: In function 'pasemi_mac_clean_rx':
drivers/net/pasemi_mac.c:553: warning: passing argument 1 of 'prefetch'
makes pointer from integer without a cast

Signed-off-by: Olof Johansson <[e-mail]>
Signed-off-by: Jeff Garzik <[e-mail]>

drivers/net/pasemi_mac.c

···
 
 	n = mac->rx->next_to_clean;
 
-	prefetch(RX_RING(mac, n));
+	prefetch(&RX_RING(mac, n));
 
 	for (count = 0; count < limit; count++) {
 		macrx = RX_RING(mac, n);