configs: enable smbios command on sandbox

To make use of the Python smbios test we need the smbios command.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index ea4e2c1..a8df5e6 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -42,6 +42,7 @@
 CONFIG_ANDROID_AB=y
 CONFIG_CMD_CPU=y
 CONFIG_CMD_LICENSE=y
+CONFIG_CMD_SMBIOS=y
 CONFIG_CMD_BOOTM_PRE_LOAD=y
 CONFIG_CMD_BOOTZ=y
 CONFIG_BOOTM_OPENRTOS=y