test/ipsec: fix result code for not supported

test/ipsec: fix result code for not supported

During SA creation, if the required algorithm is not supported,
drivers can return ENOTSUP. But in most of the IPsec test cases,
if the SA creation does not success, it just returns
TEST_FAILED.

This patch fixes this issue by returning the actual return values
from the driver to the application, so that it can make decisions
whether the test case is passed, failed or unsupported.

Fixes: 05fe65eb66b2 ("test/ipsec: introduce functional test")
Cc: stable@dpdk.org
Signed-off-by: Gagandeep Singh <g.singh@nxp.com>
Acked-by: Akhil Goyal <akhil.goyal@nxp.com>