[PATCH trivial for-9.0] smbios: add stub for smbios_get_table_legacy()

[Igor Mammedov <imammedo@redhat.com>]

QEMU build fails with
  hw/i386/fw_cfg.c:74: undefined reference to `smbios_get_table_legacy'
when it's built with only 'microvm' enabled i.e. with config patch
   +++ b/configs/devices/i386-softmmu/default.mak
   @@ -26,7 +26,7 @@

   # Boards:
   #
   -CONFIG_ISAPC=y
   -CONFIG_I440FX=y
   -CONFIG_Q35=y
   +CONFIG_ISAPC=n
   +CONFIG_I440FX=n
   +CONFIG_Q35=n

it happens because I've fogotten/lost smbios_get_table_legacy() stub.

Fix it by adding missing stub as Philippe suggested.

Fixes: b42b0e4daaa5 "smbios: build legacy mode code only for 'pc' machine"
Reported-by: Michael Tokarev <mjt@tls.msk.ru>
Singned-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
Compile tested only.

While it's fixing bug for off-tree usecase with non-upstream config,
it's trivial enough to go into 9.0 if time frame allows.
Benefit of it going into 9.0 is that folks who play with minimal builds
won't have to carry the patch in their tree.


 hw/smbios/smbios_legacy_stub.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hw/smbios/smbios_legacy_stub.c b/hw/smbios/smbios_legacy_stub.c
index f29b15316c..7d593dca98 100644
--- a/hw/smbios/smbios_legacy_stub.c
+++ b/hw/smbios/smbios_legacy_stub.c
@@ -13,3 +13,8 @@
 void smbios_add_usr_blob_size(size_t size)
 {
 }
+
+uint8_t *smbios_get_table_legacy(size_t *length, Error **errp)
+{
+    g_assert_not_reached();
+}
-- 
2.43.0