[dpdk-stable] [PATCH] doc: fix aesni mb documentation.

[Fan Zhang <roy.fan.zhang@intel.com>]

This patch fixes the incorrect intel multi buffer library support
version and missed limitation of GCM algorithm support.

Fixes: 0e9f8507afcb ("crypto/aesni_mb: support AES-GCM algorithm")
Cc: stable@dpdk.org

Signed-off-by: Fan Zhang <roy.fan.zhang@intel.com>
---
 doc/guides/cryptodevs/aesni_mb.rst | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/doc/guides/cryptodevs/aesni_mb.rst b/doc/guides/cryptodevs/aesni_mb.rst
index 63e060d75..381329513 100644
--- a/doc/guides/cryptodevs/aesni_mb.rst
+++ b/doc/guides/cryptodevs/aesni_mb.rst
@@ -51,6 +51,8 @@ Limitations
 
 * Chained mbufs are not supported.
 * Only in-place is currently supported (destination address is the same as source address).
+* RTE_CRYPTO_AEAD_AES_GCM only works properly when the multi-buffer library is
+  0.51.0 or older.
 
 
 Installation
@@ -59,8 +61,8 @@ Installation
 To build DPDK with the AESNI_MB_PMD the user is required to download the multi-buffer
 library from `here <https://github.com/01org/intel-ipsec-mb>`_
 and compile it on their user system before building DPDK.
-The latest version of the library supported by this PMD is v0.50, which
-can be downloaded from `<https://github.com/01org/intel-ipsec-mb/archive/v0.50.zip>`_.
+The latest version of the library supported by this PMD is v0.51, which
+can be downloaded from `<https://github.com/01org/intel-ipsec-mb/archive/v0.51.zip>`_.
 
 .. code-block:: console
 
-- 
2.13.6