revert the error.h file include in psa_util.c

Signed-off-by: TRodziewicz <tomasz.rodziewicz@mobica.com>
diff --git a/include/mbedtls/psa_util.h b/include/mbedtls/psa_util.h
index 1252280..d8449aa 100644
--- a/include/mbedtls/psa_util.h
+++ b/include/mbedtls/psa_util.h
@@ -44,6 +44,7 @@
 #include "mbedtls/md.h"
 #include "mbedtls/pk.h"
 #include "mbedtls/oid.h"
+#include "mbedtls/error.h"
 
 #include <string.h>