mainboard/google/reef: use common google smbios mainboard version

BUG=chromium:663243

Change-Id: Ic78a6aac11a8e842911245c59e8ced7ed2c4e27a
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/17291
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/mainboard/google/reef/Kconfig

@@ -12,6 +12,7 @@ config BOARD_GOOGLE_BASEBOARD_REEF
 	select MAINBOARD_HAS_TPM2
 	select MAINBOARD_HAS_I2C_TPM_CR50
 	select TPM2
+	select GOOGLE_SMBIOS_MAINBOARD_VERSION
 
 if BOARD_GOOGLE_BASEBOARD_REEF