staging: ccree: remove last remnants of sash algo

The hash code had some left overs from a misguided attempt
to support shash API with the HW. Remove the code handling
this.
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>