crypto/omap-sham: remove an open coded access to ->page_link

Signed-off-by: Dan Williams <[e-mail]>
[hch: split from a larger patch by Dan]
Signed-off-by: Christoph Hellwig <[e-mail]>
Acked-by: Herbert Xu <[e-mail]>
Signed-off-by: Jens Axboe <[e-mail]>

drivers/crypto/omap-sham.c

···
 		 * the dmaengine may try to DMA the incorrect amount of data.
 		 */
 		sg_init_table(&ctx->sgl, 1);
-		ctx->sgl.page_link = ctx->sg->page_link;
+		sg_assign_page(&ctx->sgl, sg_page(ctx->sg));
 		ctx->sgl.offset = ctx->sg->offset;
 		sg_dma_len(&ctx->sgl) = len32;
 		sg_dma_address(&ctx->sgl) = sg_dma_address(ctx->sg);