smbios: use struct_table_length to get SMBIOS 2.1 total table length

The current code convert the SMBIOS 2.1 entry point structure to
SMBIOS 3.0 entry point structure. The max_struct_size member in
SMBIOS 2.1 entry point structure indicates
"Size of the largest SMBIOS structure, in bytes".
We need to use struct_table_length instead.

Fixes: 1c5aab803c0b ("smbios: copy QEMU tables")
Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/drivers/misc/qfw_smbios.c b/drivers/misc/qfw_smbios.c
index 9019345..a898cb4 100644
--- a/drivers/misc/qfw_smbios.c
+++ b/drivers/misc/qfw_smbios.c
@@ -90,7 +90,7 @@
 		entry->length = sizeof(struct smbios3_entry);
 		entry->major_ver = entry2->major_ver;
 		entry->minor_ver = entry2->minor_ver;
-		entry->max_struct_size = entry2->max_struct_size;
+		entry->max_struct_size = entry2->struct_table_length;
 	} else {
 		ret = -ENOENT;
 		goto out;