fix(psa): guard Crypto APIs with CRYPTO_SUPPORT

When building Crypto APIs, it requires dependency on external headers,
e.g., Mbedtls headers.  Without the CRYPTO_SUPPORT configuration,
external dependencies are not set up,  building Crypto APIs will fail.

Guard Crypto APIs with the CRYPTO_SUPPORT configuration, to make sure
the code is built only for Crypto enabled case.

Change-Id: Iffe1220b0e6272586c46432b4f8d0512cb39b0b5
Signed-off-by: Leo Yan <leo.yan@arm.com>
diff --git a/include/lib/psa/rse_platform_api.h b/include/lib/psa/rse_platform_api.h
index 535001b..c9fdb55 100644
--- a/include/lib/psa/rse_platform_api.h
+++ b/include/lib/psa/rse_platform_api.h
@@ -11,7 +11,9 @@
 #include <stdint.h>
 
 #include "psa/error.h"
+#if CRYPTO_SUPPORT
 #include <rse_crypto_defs.h>
+#endif
 
 #define RSE_PLATFORM_API_ID_NV_READ       (1010)
 #define RSE_PLATFORM_API_ID_NV_INCREMENT  (1011)
@@ -42,6 +44,7 @@
 rse_platform_nv_counter_read(uint32_t counter_id,
 		uint32_t size, uint8_t *val);
 
+#if CRYPTO_SUPPORT
 /*
  * Reads the public key or the public part of a key pair in binary format.
  *
@@ -56,5 +59,6 @@
 psa_status_t
 rse_platform_key_read(enum rse_key_id_builtin_t key, uint8_t *data,
 		size_t data_size, size_t *data_length);
+#endif
 
 #endif /* RSE_PLATFORM_API_H */