feat(imx8m): enable snvs privileged registers access

Allow non-privileged access to all SNVS registers in case of no TEE is
available.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Change-Id: I44686a3639a68c72c7eacc80691c294d5c32c9ae
diff --git a/plat/imx/imx8m/include/imx8m_snvs.h b/plat/imx/imx8m/include/imx8m_snvs.h
new file mode 100644
index 0000000..799e1d5
--- /dev/null
+++ b/plat/imx/imx8m/include/imx8m_snvs.h
@@ -0,0 +1,12 @@
+/*
+ * Copyright 2022-2023 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef IMX8M_SNVS_H
+#define IMX8M_SNVS_H
+
+void enable_snvs_privileged_access(void);
+
+#endif