Update symmetric only reference config to include config_psa.h
Update symmetric only reference config to include config_psa.h

Since the symmetric only reference config is utilizing PSA
crypto library builds, the config file needs to included the
new config_psa.h so that all the PSA feature macros are setup
properly for the test.

Signed-off-by: John Durkop <38acf03fd265409f9ecb4322197f2d6b442e03c3@fermatsoftware.com>

ARMmbed/mbedtls,NXPmicro/mbedtls,NXPmicro/mbedtls,ARMmbed/mbedtls,Mbed-TLS/mbedtls,Mbed-TLS/mbedtls,NXPmicro/mbedtls,Mbed-TLS/mbedtls,NXPmicro/mbedtls,Mbed-TLS/mbedtls,ARMmbed/mbedtls,ARMmbed/mbedtls