feat(ethos-n): add support for NPU to cert_create

Add Juno specific Makefile to the certificate tool build. That
Makefile is included by the certificate tool Makefile to add
information about the authentication data for the
Arm(R) Ethos(TM)-N NPU's firmware binary.

Signed-off-by: Mohamed Elzahhar <Mohamed.Elzahhar@arm.com>
Signed-off-by: Rob Hughes <robert.hughes@arm.com>
Signed-off-by: Mikael Olsson <mikael.olsson@arm.com>
Change-Id: Ie4b6a1c29d73b3ed5041b57f2cd88033be18a63a
diff --git a/include/drivers/arm/ethosn_oid.h b/include/drivers/arm/ethosn_oid.h
new file mode 100644
index 0000000..a83cd09
--- /dev/null
+++ b/include/drivers/arm/ethosn_oid.h
@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2023, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef ETHOSN_OID_H
+#define ETHOSN_OID_H
+
+/* Arm(R) Ethos(TM)-N NPU Platform OID */
+#define ETHOSN_NPU_FW_CONTENT_CERT_PK_OID	"1.3.6.1.4.1.4128.2300.1"
+#define ETHOSN_NPU_FW_BINARY_OID		"1.3.6.1.4.1.4128.2300.2"
+
+#endif  /* ETHOSN_OID_H */