doc: announce hiding crypto session structures
doc: announce hiding crypto session structures

The structures rte_cryptodev_sym_session and
rte_cryptodev_asym_session are not used by the
application directly. The application just need
an opaque pointer which it can attach to rte_crypto_op
while enqueue.
Hence, these structures can be internal to library
hidden from the user.

Signed-off-by: Akhil Goyal <c3c9da6f7a1dc963875aa67cfd85a4c94f75d526@marvell.com>
Acked-by: Anoob Joseph <3ccb4777bd2856f4d9127f25efe6455b1a791ba2@marvell.com>
Acked-by: Jerin Jacob <352c4d4f9291b869992ddb67daa45ddc149fed30@marvell.com>
Acked-by: Matan Azrad <6969f5f553ad7652679a585a85d7321babc90464@nvidia.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk