mb/lenovo/t400: Add VBT file

All variants (t400, r400, t500, w500) use the same OPROM for the IGD.

Change-Id: I1b9db7b29b22809542f80f60a5e2eb3283fe1c02
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32884
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>

src/mainboard/lenovo/t400/Kconfig

@@ -25,6 +25,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select DRIVERS_LENOVO_HYBRID_GRAPHICS
 	select MAINBOARD_HAS_LIBGFXINIT
 	select MAINBOARD_USES_IFD_GBE_REGION
+	select INTEL_GMA_HAVE_VBT
 
 config MAINBOARD_DIR
 	string