ChromeOS: Fix Kconfig dependencies

Add CHROMEOS dependencies to selects for the following Kconfig
symbols:

CHROMEOS_RAMOOPS_DYNAMIC
CHROMEOS_RAMOOPS_NON_ACPI
CHROMEOS_VBNV_CMOS
CHROMEOS_VBNV_EC
CHROMEOS_VBNV_FLASH
EC_SOFTWARE_SYNC
LID_SWITCH
RETURN_FROM_VERSTAGE
SEPARATE_VERSTAGE
VBOOT_DISABLE_DEV_ON_RECOVERY
VBOOT_EC_SLOW_UPDATE
VBOOT_OPROM_MATTERS
VBOOT_STARTS_IN_BOOTBLOCK
WIPEOUT_SUPPORTED

This gets rid of these sorts of Kconfig errors:
warning: BOARD_SPECIFIC_OPTIONS selects CHROMEOS_VBNV_EC which has
unmet direct dependencies (MAINBOARD_HAS_CHROMEOS && CHROMEOS)

Note: These two boards would never actually have CHROMEOS enabled:
intel/emeraldlake2 has MAINBOARD_HAS_CHROMEOS commented out
google/peach_pit doesn't have MAINBOARD_HAS_CHROMEOS

Change-Id: I51b4ee326f082c6a656a813ee5772e9c34f5c343
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: http://review.coreboot.org/11272
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/soc/marvell/bg4cd/Kconfig b/src/soc/marvell/bg4cd/Kconfig
index 930645e..45a2abb 100644
--- a/src/soc/marvell/bg4cd/Kconfig
+++ b/src/soc/marvell/bg4cd/Kconfig
@@ -29,10 +29,12 @@
 	select GENERIC_UDELAY
 	select HAVE_MONOTONIC_TIMER
 	select GENERIC_GPIO_LIB
-	select VBOOT_STARTS_IN_BOOTBLOCK
 
 if SOC_MARVELL_BG4CD
 
+config CHROMEOS
+	select VBOOT_STARTS_IN_BOOTBLOCK
+
 config BOOTBLOCK_CPU_INIT
 	string
 	default "soc/marvell/bg4cd/bootblock.c"