psa_sim: improve log prints

- always print ERROR and FATAL messages because they should never
  occur, but when they do it's important to see them immediately;
- keep INFO prints under DEBUG guard;
- set client's PRINT as INFO message because otherwise it will
  mess test_suites's output;
- change some error messages from INFO to ERROR because that's
  what they are.

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/tests/psa-client-server/psasim/src/client.c b/tests/psa-client-server/psasim/src/client.c
index a8c9e08..4c63abf 100644
--- a/tests/psa-client-server/psasim/src/client.c
+++ b/tests/psa-client-server/psasim/src/client.c
@@ -7,12 +7,14 @@
 
 /* Includes from mbedtls */
 #include "psa/crypto.h"
+#include "util.h"
 
 int main()
 {
     /* psa_crypto_init() connects to the server */
     psa_status_t status = psa_crypto_init();
     if (status != PSA_SUCCESS) {
+        ERROR("psa_crypto_init returned %d", status);
         return 1;
     }