PS_TEST: Fix return type of tfm_ps_test_init

tfm_ps_test_init does not return, thus change the return type to void.

Change-Id: Idbc3db63d87f39ba48f5082f9a6c9d8c9d327d8d
Signed-off-by: Bohdan Hunko <Bohdan.Hunko@infineon.com>
1 file changed