The following mbedTLS APIs have been deprecated and replaced with the
new ones which return error codes:
mbedtls_shaX_starts -> mbedtls_shaX_starts_ret
mbedtls_shaX_update -> mbedtls_shaX_update_ret
mbedtls_shaX_finish -> mbedtls_shaX_finish_ret
mbedtls_shaX_process -> mbedtls_shaX_internal_process
Update hardware implementations of SHA functions, and other IDF
components which used above functions, to use new versions.
* Only direct invocation of cypto_hash_sha256 & crypto_hash_sha512 produced correct output.
* Some remaining header file mixups, so changed approach to wrapping the state structures.
* Fixes https://github.com/espressif/esp-idf/issues/1044 (crypto_sign problems)
* Add option to disable mbedTLS implementation for SHA256 & SHA512 in libsodium
