vboot: Install files into FW_MAIN_A and FW_MAIN_B unless they're for RO

Setup an initial rule to make use of the updatable CBFS regions in fmap.

Change-Id: I1fe1c6e7574854b735760c85590da6e297f6e687
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: https://review.coreboot.org/13060
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

Makefile.inc

@@ -112,6 +112,7 @@ spc :=
 spc +=
 $(spc) :=
 $(spc) +=
+comma := ,
 
 # files-in-dir-recursive,dir,files
 files-in-dir-recursive=$(filter $(1)%,$(2))

src/vendorcode/google/chromeos/vboot2/Makefile.inc

@@ -85,3 +85,14 @@ else
 romstage-srcs += $(objgenerated)/libverstage.a
 endif
 endif # CONFIG_SEPARATE_VERSTAGE
+
+# Define a list of files that need to be in RO only.
+# All other files will be installed into RO and RW regions
+# Use $(sort) to cut down on extra spaces that would be translated to commas
+regions-for-file = $(subst $(spc),$(comma),$(sort \
+	$(if $(filter \
+		$(if $(filter y,$(CONFIG_VBOOT_STARTS_IN_BOOTBLOCK)),, \
+			%/romstage) \
+		mts \
+		%/verstage \
+		,$(1)),COREBOOT,COREBOOT FW_MAIN_A FW_MAIN_B)))