This commit update the NS board variant from `mps2_an521_nonsecure`
to `mps2_an521_ns` to maintain consistency across zephyr.
Signed-off-by: Kevin Townsend <kevin.townsend@linaro.org>
The example in folder `samples/tfm_integration/psa_level_1` contains
code that demonstrate usage of PSA crypto APIs in Zephyr rather than the
PSA levels. Therefore renaming the sample as `psa_crypto`.
Signed-off-by: Devaraj Ranganna <devaraj.ranganna@linaro.org>
Kevin Townsend