libertas: make if_sdio align packets

Incoming packets have to be aligned or the IP stack becomes upset.
Make sure to shift them two bytes to achieve this.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/libertas/if_sdio.c

@@ -182,12 +182,14 @@ static int if_sdio_handle_data(struct if_sdio_card *card,
 		goto out;
 	}
 
-	skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE);
+	skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + NET_IP_ALIGN);
 	if (!skb) {
 		ret = -ENOMEM;
 		goto out;
 	}
 
+	skb_reserve(skb, NET_IP_ALIGN);
+
 	data = skb_put(skb, size);
 
 	memcpy(data, buffer, size);