programs: pkey: Use tf-psa-crypto/build_info.h

pkey programs are crypto programs (only linked to
the TF-PSA-Crypto library) thus use the TF-PSA-Crypto
build-time configuration info file
tf-psa-crypto/build_info.h instead of the Mbed TLS one.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/programs/pkey/gen_key.c b/programs/pkey/gen_key.c
index f1ed511..4d329f2 100644
--- a/programs/pkey/gen_key.c
+++ b/programs/pkey/gen_key.c
@@ -7,7 +7,7 @@
 
 #define MBEDTLS_DECLARE_PRIVATE_IDENTIFIERS
 
-#include "mbedtls/build_info.h"
+#include "tf-psa-crypto/build_info.h"
 
 #include "mbedtls/platform.h"