chromeos: always enable timestamps

Timestamps should not be forced on by a subset of chipsets.
However, they are a requirement on Chrome OS platforms, so
have CONFIG_CHROMEOS select it.

Change-Id: I408c6b17aa8721a3abec69020084174e414a8940
Signed-off-by: Stefan Reinauer <reinauer@chromium.org>
Reviewed-on: http://review.coreboot.org/10357
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins)

src/soc/intel/baytrail/Kconfig

@@ -14,7 +14,6 @@ config CPU_SPECIFIC_OPTIONS
 	select BACKUP_DEFAULT_SMM_REGION
 	select CACHE_MRC_SETTINGS
 	select CAR_MIGRATION
-	select COLLECT_TIMESTAMPS
 	select CPU_INTEL_TURBO_NOT_PACKAGE_SCOPED
 	select SUPPORT_CPU_UCODE_IN_CBFS
 	select HAVE_SMI_HANDLER

src/soc/intel/broadwell/Kconfig

@@ -20,7 +20,6 @@ config CPU_SPECIFIC_OPTIONS
 	select CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM
 	select CACHE_ROM
 	select CAR_MIGRATION
-	select COLLECT_TIMESTAMPS
 	select CPU_INTEL_FIRMWARE_INTERFACE_TABLE
 	select SUPPORT_CPU_UCODE_IN_CBFS
 	select HAVE_MONOTONIC_TIMER

src/vendorcode/google/chromeos/Kconfig

@@ -30,6 +30,7 @@ config CHROMEOS
 	select SKIP_TPM_STARTUP_ON_NORMAL_BOOT
 	select BOOTMODE_STRAPS
 	select ELOG
+	select COLLECT_TIMESTAMPS
 	help
 	  Enable ChromeOS specific features like the GPIO sub table in
 	  the coreboot table. NOTE: Enabling this option on an unsupported