crypto: sun8i-ss - use dma_addr instead u32

The DMA address need to be stored in a dma_addr_t

Fixes: 359e893e ("crypto: sun8i-ss - rework handling of IV")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>