mb/bostentech/gbyt4: Add VBT

This is useful when booted with the (not yet mainline) libgfxinit for
Bay Trail.

Signed-off-by: Mate Kukri <km@mkukri.xyz>
Change-Id: I73d54c73a12430074f4f3880caf842b3491b5170
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86218
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>

src/mainboard/bostentech/gbyt4/Kconfig

@@ -4,11 +4,12 @@ if BOARD_BOSTENTECH_GBYT4
 
 config BOARD_SPECIFIC_OPTIONS
 	def_bool y
-	select SOC_INTEL_BAYTRAIL
 	select BOARD_ROMSIZE_KB_8192
+	select HAVE_ACPI_RESUME
 	select HAVE_ACPI_TABLES
 	select HAVE_OPTION_TABLE
-	select HAVE_ACPI_RESUME
+	select INTEL_GMA_HAVE_VBT
+	select SOC_INTEL_BAYTRAIL
 	select SUPERIO_ITE_IT8728F
 
 config MAINBOARD_DIR