SMBIOS: Update BMC Interface Type field

Change-Id: I68a8515adf5b29a080f8c5c5b7a96b28bca74676
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/31421
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Richard Spiegel <richard.spiegel@silverbackltd.com>

src/include/smbios.h

@@ -484,6 +484,7 @@ enum smbios_bmc_interface_type {
 	SMBIOS_BMC_INTERFACE_KCS,
 	SMBIOS_BMC_INTERFACE_SMIC,
 	SMBIOS_BMC_INTERFACE_BLOCK,
+	SMBIOS_BMC_INTERFACE_SMBUS,
 };
 
 typedef enum {