app/crypto-perf: add range/list of sizes

app/crypto-perf: add range/list of sizes

So far, the crypto performance application was only able to
test one buffer size and one burst size.

With this commit, multiple sizes can be passed, either as a range
of values or as a list of values.

Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Acked-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>