chromeos: import Chrome OS fmaps

These are generated from depthcharge's board/*/fmap.dts using the
dts-to-fmd.sh script.

One special case is google/veyron's chromeos.fmd, which is used for a
larger set of boards - no problem since the converted fmd was the same
for all of them.

Set aside 128K for the bootblock on non-x86 systems (where the COREBOOT
region ends up at the beginning of flash). This becomes necessary
because we're working without a real cbfs master header (exists for
transition only), which carved out the space for the offset.

Change-Id: Ieeb33702d3e58e07e958523533f83da97237ecf1
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: https://review.coreboot.org/12715
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

src/Kconfig

@@ -396,6 +396,7 @@ config CBFS_SIZE
 
 config FMDFILE
 	string "fmap description file in fmd format"
+	default "src/mainboard/$(CONFIG_MAINBOARD_DIR)/chromeos.fmd" if CHROMEOS
 	default ""
 	help
 	  The build system creates a default FMAP from ROM_SIZE and CBFS_SIZE,