[PATCH] crypto: dma_map_sg can handle chained SG

Hello

Some drivers use two dma_map_sg path according to SG are chained or not.
Since dma_map_sg can handle both case, this patch series clean all code
with references to sg chained.

Note that I could only compile test sahara and caam patch.
And none could be tested due to lack oh hardware.

Regards

LABBE Corentin