examples/l2fwd-crypto: fix packet length while decryption
examples/l2fwd-crypto: fix packet length while decryption

There were some padding left when a packet gets decrypted. This
patch removes those padding.
This patch also removes the padding left after verifying auth of
the packet.

Fixes: e2cdfbd07c8a ("examples/l2fwd-crypto: fix port id type")
Cc: stable@dpdk.org

Signed-off-by: Rohit Raj <c2bbc9a98999d1492261845b669d76db72e422f6@nxp.com>
Acked-by: Akhil Goyal <c3c9da6f7a1dc963875aa67cfd85a4c94f75d526@marvell.com>

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