examples/l2fwd-crypto: fix option parsing
examples/l2fwd-crypto: fix option parsing

Statistics period time option is parsed with -T argument,
but -t was accepted by mistake, instead.

Fixes: 387259bd6c67 ("examples/l2fwd-crypto: add sample application")
Cc: stable@dpdk.org

Signed-off-by: Pablo de Lara <28355d9cfe41bb8148aea0fb24f47aae8f4217a1@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk