Include <linux/cryptohash.h> to pickup the declarations for sha_transform
and sha_init to quite the sparse noise:

  warning: symbol 'sha_transform' was not declared. Should it be static?
  warning: symbol 'sha_init' was not declared. Should it be static?
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: NMandeep Singh Baines <msb@chromium.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>