[EXT] [PATCH 1/2] app/test-crypto-perf: fix number of scheduler sessions

[Akhil Goyal]

> The scheduler PMD needs 1 session header,
> along with a session per worker.
> 
> After the session rework, this change was made to other apps,
> for example l2fwd-crypto, but was missed in test-crypto-perf.
> 
> Fixes: bdce2564dbf7 ("cryptodev: rework session framework")
> Cc: gakhil at marvell.com
> 
> Signed-off-by: Ciara Power <ciara.power at intel.com>
Acked-by: Akhil Goyal <gakhil at marvell.com>