[EXT] [PATCH] cryptodev: fix sym session mempool creation description

[Akhil Goyal]

> After the session mempool creation API is changed, some
> description is no longer valid. This patch fixes the
> descriptions in both API comment and the programmer's guide.
> 
> Fixes: bdce2564dbf7 ("cryptodev: rework session framework")
> Cc: gakhil at marvell.com
> 
> Signed-off-by: Fan Zhang <fanzhang.oss at gmail.com>
Acked-by: Akhil Goyal <gakhil at marvell.com>

Applied to dpdk-next-crypto with a couple of minor fixes.

Thanks.