net/mlx5e: use %pad format string for dma_addr_t

On 32-bit ARM with 64-bit dma_addr_t I get this warning about an
incorrect format string:

In file included from /git/arm-soc/drivers/net/ethernet/mellanox/mlx5/core/alloc.c:42:0:
drivers/net/ethernet/mellanox/mlx5/core/alloc.c: In function ‘mlx5_frag_buf_alloc_node’:
drivers/net/ethernet/mellanox/mlx5/core/alloc.c:134:12: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]

We have the special %pad format for printing dma_addr_t, so use that
to print the correct address and avoid the warning.

Fixes: 1c1b522808a1 ("net/mlx5e: Implement Fragmented Work Queue (WQ)")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlx5/core/alloc.c

@@ -130,8 +130,8 @@ int mlx5_frag_buf_alloc_node(struct mlx5_core_dev *dev, int size,
 		if (frag->map & ((1 << buf->page_shift) - 1)) {
 			dma_free_coherent(&dev->pdev->dev, frag_sz,
 					  buf->frags[i].buf, buf->frags[i].map);
-			mlx5_core_warn(dev, "unexpected map alignment: 0x%p, page_shift=%d\n",
-				       (void *)frag->map, buf->page_shift);
+			mlx5_core_warn(dev, "unexpected map alignment: %pad, page_shift=%d\n",
+				       &frag->map, buf->page_shift);
 			goto err_free_buf;
 		}
 		size -= frag_sz;