doc: announce removal of crypto list end enumerators
doc: announce removal of crypto list end enumerators

Enumerators RTE_CRYPTO_CIPHER_LIST_END, RTE_CRYPTO_AUTH_LIST_END,
RTE_CRYPTO_AEAD_LIST_END will be removed to prevent some problems
that may arise when adding new algorithms.

Signed-off-by: Arek Kusztal <4bf5ef838d7576d5719b17cd64a25f70d57e7e5b@intel.com>
Acked-by: Bruce Richardson <66b9e8e8fbd5e9f41f91b0af050876182ce9d0e4@intel.com>
Acked-by: Fiona Trahe <7ba562cc372916cd557d0be347608f8b4da4f746@intel.com>
Acked-by: Akhil Goyal <74d7c4c993a22c1d4f60c46ff3d95c969a24a25c@nxp.com>

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