x86: Allow builds without ACPI tables Fix build bug that is referencing vboot_data from vendorcode/google/chromeos/gnvs.c when CONFIG_HAVE_ACPI_TABLES is not set. BRANCH=none BUG=None TEST=Build and run on Glados 1. Checkout updated patches for config, skylake and glados through FspNotify1 2. Verify that mainboard/intel/glados/Kconfig does not select HAVE_ACPI_TABLES 3. emerge-glados coreboot 4. Test passes if build completes successfully Change-Id: Icac3845f7e2d1ddffa5f787a640033fba286c13e Signed-off-by: Lee Leahy <[email protected]> Reviewed-on: https://chromium-review.googlesource.com/254360 Reviewed-by: Aaron Durbin <[email protected]> Commit-Queue: Leroy P Leahy <[email protected]> Tested-by: Leroy P Leahy <[email protected]>