nrf_security: Adapt to the TF-M STD configuration

TF-M has an option to select if STD functions like
printf are available with CONFIG_TFM_INCLUDE_STDLIBC.

MbedlTLS also has a relevant option as well:
MBEDTLS_PLATFORM_NO_STD_FUNCTIONS

This makes sure that when inside the TF-M build
no STD functions are available we set the appropriate
configuration in mbedTLS.

Signed-off-by: Georgios Vasilakis <georgios.vasilakis@nordicsemi.no>

Author: Vge0rge

subsys/nrf_security/configs/psa_crypto_config.h.template

@@ -27,6 +27,12 @@
 /* TF-M */
 #cmakedefine MBEDTLS_PSA_CRYPTO_SPM
 
+#if defined(__NRF_TFM__) && \
+    !defined(CONFIG_TFM_INCLUDE_STDLIBC) && \
+    !defined(MBEDTLS_PLATFORM_NO_STD_FUNCTIONS)
+#define MBEDTLS_PLATFORM_NO_STD_FUNCTIONS
+#endif
+
 /* RSA */
 #cmakedefine PSA_MAX_RSA_KEY_BITS @PSA_MAX_RSA_KEY_BITS@