ChromeOS: Use CHROMEOS_NVS guard

Replace CONFIG(CHROMEOS) with CONFIG(CHROMEOS_NVS) for cases where
the conditional and dependency are clearly about the presence of
an ACPI NVS table specified by vendorcode. For couple locations also
CONFIG(HAVE_ACPI_TABLES) changes to CONFIG(CHROMEOS_NVS).

This also helps find some of the CONFIG(CHROMEOS) cases that might
be more FMAP and VPD related and not about ChromeOS per-se, as
suggested by followup works.

Change-Id: Ife888ae43093949bb2d3e397565033037396f434
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50611
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Lance Zhao
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/vendorcode/google/chromeos/Kconfig

@@ -12,6 +12,7 @@ config CHROMEOS
 	select ELOG if BOOT_DEVICE_SUPPORTS_WRITES
 	select COLLECT_TIMESTAMPS
 	select VBOOT
+	select CHROMEOS_NVS if ACPI_SOC_NVS
 	select VPD
 	select VBOOT_SLOTS_RW_AB
 	help
@@ -87,5 +88,9 @@ config CHROMEOS_DRAM_PART_NUMBER_IN_CBI
 	  Some boards declare the DRAM part number in the CBI instead of the SPD.  This option
 	  allows those boards to declare that their DRAM part number is stored in the CBI.
 
+config CHROMEOS_NVS
+	bool
+	depends on ACPI_SOC_NVS
+
 endif # CHROMEOS
 endmenu

src/vendorcode/google/chromeos/Makefile.inc

@@ -1,7 +1,7 @@
 ## SPDX-License-Identifier: GPL-2.0-only
 
 ramstage-$(CONFIG_ELOG) += elog.c
-ramstage-$(CONFIG_HAVE_ACPI_TABLES) += gnvs.c
+ramstage-$(CONFIG_CHROMEOS_NVS) += gnvs.c
 ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpi.c
 ramstage-$(CONFIG_CHROMEOS_RAMOOPS) += ramoops.c
 ramstage-y += vpd_mac.c vpd_serialno.c vpd_calibration.c

src/vendorcode/google/chromeos/ramoops.c

@@ -38,7 +38,7 @@ static void ramoops_alloc(void *arg)
 		return;
 	}
 
-	if (CONFIG(HAVE_ACPI_TABLES))
+	if (CONFIG(CHROMEOS_NVS))
 		set_ramoops(ram_oops, size);
 }