[BNX2]: Fix compiler warning.

Change bnx2_init_napi() to void.

Warning was noted by DaveM.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bnx2.c

@@ -7313,7 +7313,7 @@ bnx2_bus_string(struct bnx2 *bp, char *str)
 	return str;
 }
 
-static int __devinit
+static void __devinit
 bnx2_init_napi(struct bnx2 *bp)
 {
 	int i;