driver: misc: Add MU and S400 API to communicate with Sentinel

Add MU driver and S400 API. Need enable MISC driver to work

Signed-off-by: Ye Li <ye.li@nxp.com>
diff --git a/arch/arm/include/asm/arch-imx8ulp/s400_api.h b/arch/arm/include/asm/arch-imx8ulp/s400_api.h
new file mode 100644
index 0000000..3ba6b52
--- /dev/null
+++ b/arch/arm/include/asm/arch-imx8ulp/s400_api.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2021 NXP
+ */
+
+#ifndef __S400_API_H__
+#define __S400_API_H__
+
+#define AHAB_VERSION    0x6
+#define AHAB_CMD_TAG    0x17
+#define AHAB_RESP_TAG   0xe1
+
+#define AHAB_LOG_CID            0x21
+#define AHAB_AUTH_OEM_CTNR_CID  0x87
+#define AHAB_VERIFY_IMG_CID     0x88
+#define AHAB_RELEASE_CTNR_CID   0x89
+#define AHAB_RELEASE_RDC_REQ_CID   0xC4
+
+#define S400_MAX_MSG          8U
+
+struct imx8ulp_s400_msg {
+	u8 version;
+	u8 size;
+	u8 command;
+	u8 tag;
+	u32 data[(S400_MAX_MSG - 1U)];
+};
+
+int ahab_release_rdc(u8 core_id);
+#endif