dma: use OpenSSL 1.1 init API

The SSL_library_init() and OpenSSL_add_ssl_algorithms() functions were
deprecated in OpenSSL 1.1.0 by OPENSSL_init_ssl().

and

The ERR_load_crypto_strings(), SSL_load_error_strings(), and
ERR_free_strings() functions were deprecated in OpenSSL 1.1.0 by
OPENSSL_init_crypto() and OPENSSL_init_ssl() and should not be used.

Reviewed by: ngie
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D40065