cleanup: include/: move misc/reboot.h to power/reboot.h

move misc/reboot.h to power/reboot.h and
create a shim for backward-compatibility.

No functional changes to the headers.
A warning in the shim can be controlled with CONFIG_COMPAT_INCLUDES.

Related to #16539

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

include/power/reboot.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2015 Wind River Systems, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @file
+ * @brief Common target reboot functionality
+ *
+ * @details See misc/Kconfig and the reboot help for details.
+ */
+
+#ifndef ZEPHYR_INCLUDE_POWER_REBOOT_H_
+#define ZEPHYR_INCLUDE_POWER_REBOOT_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define SYS_REBOOT_WARM 0
+#define SYS_REBOOT_COLD 1
+
+/**
+ * @brief Reboot the system
+ *
+ * Reboot the system in the manner specified by @a type.  Not all architectures
+ * or platforms support the various reboot types (SYS_REBOOT_COLD,
+ * SYS_REBOOT_WARM).
+ *
+ * When successful, this routine does not return.
+ *
+ * @return N/A
+ */
+
+extern void sys_reboot(int type);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ZEPHYR_INCLUDE_POWER_REBOOT_H_ */