The scatterwalk_aligned() are no longer used since removing blkcipher
and ablkcipher support, all use of it has been removed since
commit d63007eb95 ("crypto: ablkcipher - remove deprecated
and unused ablkcipher support"), so remove it.
Signed-off-by: Gaosheng Cui <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>