mt76: mt7615: fix a precision vs width bug in printk

Precision "%.*s" was intended instead of width "%*s".  The original code
will print garbage from beyond the end of the skb->data.

Fixes: d76d6c3ba2 ("mt76: mt7615: limit firmware log message printk to buffer length")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7615/mcu.c

@@ -453,7 +453,7 @@ mt7615_mcu_rx_log_message(struct mt7615_dev *dev, struct sk_buff *skb)
 		break;
 	}
 
-	wiphy_info(mt76_hw(dev)->wiphy, "%s: %*s", type,
+	wiphy_info(mt76_hw(dev)->wiphy, "%s: %.*s", type,
 		   (int)(skb->len - sizeof(*rxd)), data);
 }