Crypto: Asymmetric encryption tests can be skipped if RSA not supported

Do not mark the asymmetric encryption tests as failed if the API
returns PSA_ERROR_NOT_SUPPORTED and the algorithm is RSA. Just
print a "skipping" message is enough.

Signed-off-by: Antonio de Angelis <antonio.deangelis@arm.com>
Change-Id: I246e8040464b25afcdbec72f46cafe38573125bd
1 file changed