smbios: correctly fill chassis handle

The chassis handle field in the type 2 structure must point to the handle
of the type 3 structure.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/lib/smbios.c b/lib/smbios.c
index 6190c16..cd750cc 100644
--- a/lib/smbios.c
+++ b/lib/smbios.c
@@ -422,6 +422,7 @@
 	t->asset_tag_number = smbios_add_prop(ctx, "asset-tag", NULL);
 	t->feature_flags = SMBIOS_BOARD_FEATURE_HOSTING;
 	t->board_type = SMBIOS_BOARD_MOTHERBOARD;
+	t->chassis_handle = handle + 1;
 
 	len = t->length + smbios_string_table_len(ctx);
 	*current += len;
@@ -550,6 +551,7 @@
 	{ smbios_write_type0, "bios", },
 	{ smbios_write_type1, "system", },
 	{ smbios_write_type2, "baseboard", },
+	/* Type 3 must immediately follow type 2 due to chassis handle. */
 	{ smbios_write_type3, "chassis", },
 	{ smbios_write_type4, },
 	{ smbios_write_type32, },