mb/google/octopus: Add new board

Add octopus board using GLK soc. Copied base code from mainboard/intel/glkrvp.
TODO: Fix as per octopus schematic.

Change-Id: Ic8c25b3fafbfef31b8b3b802acb3bc53ee7146b6
Signed-off-by: Hannah Williams <hannah.williams@intel.com>
Reviewed-on: https://review.coreboot.org/23685
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/octopus/Kconfig.name

@@ -0,0 +1,4 @@
+config BOARD_GOOGLE_OCTOPUS
+	bool "Octopus"
+	select BOARD_GOOGLE_BASEBOARD_OCTOPUS
+	select BASEBOARD_OCTOPUS_LAPTOP