Update libpayloads understanding of the coreboot tables.

Give it somewhere to put the new info in sysinfo, and tell it how to parse
the new tables which it doesn't yet understand.

Change-Id: I01d3318138696e6407553c27c1814f79e3fbc4f8
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: http://review.coreboot.org/1718
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

payloads/libpayload/Config.in

@@ -53,6 +53,12 @@ config DEVELOPER
 	  Prompt for developer options. These options are only interesting for
 	  libpayload developers.
 
+config CHROMEOS
+	bool "ChromeOS specific features"
+	default n
+	help
+	  Enable ChromeOS specific features.
+
 endmenu
 
 menu "Architecture Options"