cleanup asm/scatterlist.h includes

Not architecture specific code should not #include <asm/scatterlist.h>.

This patch therefore either replaces them with
#include <linux/scatterlist.h> or simply removes them if they were
unused.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

crypto/sha256_generic.c

@@ -22,7 +22,6 @@
 #include <linux/crypto.h>
 #include <linux/types.h>
 #include <crypto/sha.h>
-#include <asm/scatterlist.h>
 #include <asm/byteorder.h>
 
 struct sha256_ctx {