TG3: limit reaches -1

With while (limit--) { ... } limit reaches -1, so 0 means success.
Signed-off-by: NRoel Kluin <roel.kluin@gmail.com>
Acked-by: NMichael Chan <mchan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/tg3.c

@@ -852,7 +852,7 @@ static int tg3_bmcr_reset(struct tg3 *tp)
 		}
 		udelay(10);
 	}
-	if (limit <= 0)
+	if (limit < 0)
 		return -EBUSY;
 
 	return 0;
@@ -1603,7 +1603,7 @@ static int tg3_wait_macro_done(struct tg3 *tp)
 				break;
 		}
 	}
-	if (limit <= 0)
+	if (limit < 0)
 		return -EBUSY;
 
 	return 0;