doc: announce crypto device type enumeration removal
doc: announce crypto device type enumeration removal

Refer to RFC patch - cryptodev: remove crypto device type enumeration

It is planned to remove device type enumeration rte_cryptodev_type from
library to remove the coupling between crypto PMD and the librte_cryptodev.

In this case following stuctures will be changed: rte_cryptodev_session,
rte_cryptodev_sym_session, rte_cryptodev_info, rte_cryptodev.

It is planned to change the function rte_cryptodev_count_devtype().
The function prototype doesn’t clearly show the operation.
>From next release 17.08 the dev_type will be changed to driver_id.
So the function name will change to rte_cryptodev_device_count_by_driver().

Signed-off-by: Slawomir Mrozowicz <e88e38a554fa6ee2c1af7d54e8bb48581354aa35@intel.com>
Acked-by: Pablo de Lara <28355d9cfe41bb8148aea0fb24f47aae8f4217a1@intel.com>
Acked-by: Declan Doherty <b4388acd850cd8caad5000a112795063f04807ac@intel.com>
Acked-by: Jerin Jacob <5bca7d2a432bc0f5422b70b2701a4e4fa32edd00@caviumnetworks.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