amd-xgbe: Fix sparse endian warnings

Change the types of the descriptor entries in the xgbe_ring_desc struct
from u32 to __le32 to fix endian warnings issued by sparse.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/amd/xgbe/xgbe.h

@@ -246,10 +246,10 @@ struct xgbe_packet_data {
 
 /* Common Rx and Tx descriptor mapping */
 struct xgbe_ring_desc {
-	u32 desc0;
-	u32 desc1;
-	u32 desc2;
-	u32 desc3;
+	__le32 desc0;
+	__le32 desc1;
+	__le32 desc2;
+	__le32 desc3;
 };
 
 /* Page allocation related values */