feat(smc): add test for vendor-specific service

Add test to check vendor-specific el3 service calls.

Change-Id: I981d1cacec8690f57e51a5f05d51b6e437d1eb6a
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
diff --git a/include/runtime_services/ven_el3_svc.h b/include/runtime_services/ven_el3_svc.h
new file mode 100644
index 0000000..3a61ecd
--- /dev/null
+++ b/include/runtime_services/ven_el3_svc.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2024, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef VEN_EL3_SVC_H
+#define VEN_EL3_SVC_H
+
+/*
+ * Definitions related to the Vendor-Specific El3 as per the SMC Calling Convention.
+ */
+
+/* VEN_EL3_SMC_32		0x87000000U */
+/* VEN_EL3_SMC_64		0xC7000000U */
+
+#define VEN_EL3_SVC_UID		0x8700ff01
+/*				0x8700ff02 is reserved */
+#define VEN_EL3_SVC_VERSION	0x8700ff03
+
+#define VEN_EL3_SVC_VERSION_MAJOR	1
+#define VEN_EL3_SVC_VERSION_MINOR	0
+
+#endif /* VEN_EL3_SVC_H */