drivers/net/ftgmac100.c: Fix a debug print

In the debug print in ftgmac100_send we want to say where the packet is
in memory and what the length is, so use %p to print that.

Signed-off-by: Tom Rini <trini@konsulko.com>

drivers/net/ftgmac100.c

@@ -546,7 +546,7 @@ static int ftgmac100_send(struct udevice *dev, void *packet, int length)
 		return -EPERM;
 	}
 
-	debug("%s(%x, %x)\n", __func__, (int)packet, length);
+	debug("%s(%p, %x)\n", __func__, packet, length);
 
 	length = (length < ETH_ZLEN) ? ETH_ZLEN : length;