x86: sysreset: Move priv/plat structs to headers

With the new of-platdata, these need to be available to dt_platdata.c
so must be in header files. Move them and add the dtd struct too.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

arch/x86/include/asm/sysreset.h

@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2020 Google LLC
+ */
+#ifndef _X86_ASM_SYSRESET_H_
+#define _X86_ASM_SYSRESET_H_
+
+#include <dt-structs.h>
+
+struct x86_sysreset_plat {
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+	struct dtd_x86_reset dtplat;
+#endif
+
+	struct udevice *pch;
+};
+
+#endif	/* _X86_ASM_SYSRESET_H_ */

drivers/sysreset/sysreset_x86.c

@@ -13,10 +13,7 @@
 #include <acpi/acpi_s3.h>
 #include <asm/io.h>
 #include <asm/processor.h>
-
-struct x86_sysreset_plat {
-	struct udevice *pch;
-};
+#include <asm/sysreset.h>
 
 /*
  * Power down the machine by using the power management sleep control