mb/google/poppy: add VBTs for remaining variants

Add VBT files for Atlas, Nocturne, Rammus, and Soraka variants.
Extracted from ChromeOS recovery images for the respective boards.
Select INTEL_GMA_HAVE_VBT for all variants except Poppy, since
it doesn't have a VBT (or a recovery image from which to extract one).

Change-Id: Icba2741e0b7309c22c027f956cd20cec78f34052
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37311
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/google/poppy/Kconfig

@@ -10,7 +10,7 @@ config BOARD_GOOGLE_BASEBOARD_POPPY
 	select EC_GOOGLE_CHROMEEC_ESPI
 	select HAVE_ACPI_RESUME
 	select HAVE_ACPI_TABLES
-	select INTEL_GMA_HAVE_VBT if BOARD_GOOGLE_NAMI || BOARD_GOOGLE_NAUTILUS
+	select INTEL_GMA_HAVE_VBT if !BOARD_GOOGLE_POPPY
 	select INTEL_LPSS_UART_FOR_CONSOLE
 	select MAINBOARD_HAS_CHROMEOS
 	select SOC_INTEL_KABYLAKE