ecc: Merge partly duplicated code.
* cipher/ecc-eddsa.c (_gcry_ecc_eddsa_sign): Factor A hashing out to ... (_gcry_ecc_eddsa_compute_h_d): new function. * cipher/ecc-misc.c (_gcry_ecc_compute_public): Use new function. (reverse_buffer): Remove.
- Signed-off-by: Werner Koch <wk@gnupg.org>