mainboard/google/reef: increase pre cbmem console size for Chrome OS

verstage can be pretty chatty so bump the pre cbmem console size
when building for Chrome OS so that all messages can be observed.

BUG=b:35775104
BRANCH=reef
TEST=Booted and noted no cutoff of console when sec data being saved.

Change-Id: I0ce2976572dedf976f051c74a3014d282c3c5f4c
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/18679
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/mainboard/google/reef/Kconfig

@@ -93,4 +93,9 @@ config INCLUDE_NHLT_BLOBS
 	select NHLT_DA7219
 	select NHLT_MAX98357
 
+config PRERAM_CBMEM_CONSOLE_SIZE
+	hex
+	default 0xe00 if CHROMEOS
+	default 0xc00
+
 endif # BOARD_GOOGLE_REEF