sysinfo: Add driver for IOT2050 boards

This brings a sysinfo driver and DT entry for the IOT2050 board series.
It translates the board information passed from SE-Boot to SPL into
values that can be retrieved via the sysinfo API. Will is already used
to fill the SMBIOS table when booting via EFI.

Signed-off-by: Baocheng Su <baocheng.su@siemens.com>
Signed-off-by: Li Hua Qian <huaqian.li@siemens.com>
[Jan: split-off as separate patch, cleanup]
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
diff --git a/drivers/sysinfo/iot2050.h b/drivers/sysinfo/iot2050.h
new file mode 100644
index 0000000..657221d
--- /dev/null
+++ b/drivers/sysinfo/iot2050.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) Siemens AG, 2025
+ */
+
+#include <sysinfo.h>
+
+enum sysinfo_id_iot2050 {
+	BOARD_MLFB		= SYSID_USER,
+	BOARD_A5E,
+	BOARD_NAME,
+	BOARD_UUID,
+	BOARD_SEBOOT_VER,
+};