crypto: inside-secure - Fix `dma_unmap_sg()` nents value

The `dma_unmap_sg()` functions should be called with the same nents as the
`dma_map_sg()`, not the value the map function returned.

Fixes: c957f8b3e2e5 ("crypto: inside-secure - avoid unmapping DMA memory that was not mapped")
Signed-off-by: Thomas Fourier <[e-mail]>
Reviewed-by: Antoine Tenart <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

drivers/crypto/inside-secure/safexcel_hash.c

···
 	safexcel_complete(priv, ring);
 
 	if (sreq->nents) {
-		dma_unmap_sg(priv->dev, areq->src, sreq->nents, DMA_TO_DEVICE);
+		dma_unmap_sg(priv->dev, areq->src,
+			     sg_nents_for_len(areq->src, areq->nbytes),
+			     DMA_TO_DEVICE);
 		sreq->nents = 0;
 	}
 
···
 			 DMA_FROM_DEVICE);
 unmap_sg:
 	if (req->nents) {
-		dma_unmap_sg(priv->dev, areq->src, req->nents, DMA_TO_DEVICE);
+		dma_unmap_sg(priv->dev, areq->src,
+			     sg_nents_for_len(areq->src, areq->nbytes),
+			     DMA_TO_DEVICE);
 		req->nents = 0;
 	}
 cdesc_rollback: