Crypto: Add IPC compatibility

This patch introduces compatibility in the Crypto
service with the IPC infrastructure of TF-M.

Change-Id: I5a095780e1f2bd489c83cfbca138ca6dd0bfe9ba
Signed-off-by: Antonio de Angelis <antonio.deangelis@arm.com>
diff --git a/secure_fw/services/crypto/crypto_engine.h b/secure_fw/services/crypto/crypto_engine.h
index 6263aae..3130396 100644
--- a/secure_fw/services/crypto/crypto_engine.h
+++ b/secure_fw/services/crypto/crypto_engine.h
@@ -25,6 +25,7 @@
 #if !defined(MBEDTLS_CONFIG_FILE)
 #include "platform/ext/common/tfm_mbedtls_config.h"
 #else
+// cppcheck-suppress preprocessorErrorDirective
 #include MBEDTLS_CONFIG_FILE
 #endif