util: add smmstoretool for editing SMMSTORE

Offline SMMSTORE variable modification tool.  Can be used to
pre-configure ROM image or debug EFI state stored in a dump.

Change-Id: I6c1c06f1d0c39c13b5be76a3070f09b715aca6e0
Signed-off-by: Sergii Dmytruk <sergii.dmytruk@3mdeb.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79080
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

util/smmstoretool/guids.h

@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef SMMSTORETOOL__GUIDS_H__
+#define SMMSTORETOOL__GUIDS_H__
+
+#include <stdbool.h>
+
+#include "udk2017.h"
+
+#define GUID_LEN 35
+
+struct guid_alias_t {
+	const char *alias;
+	EFI_GUID guid;
+};
+
+extern const struct guid_alias_t known_guids[];
+
+extern const int known_guid_count;
+
+char *format_guid(const EFI_GUID *guid, bool use_alias);
+
+bool parse_guid(const char str[], EFI_GUID *guid);
+
+#endif // SMMSTORETOOL__GUIDS_H__