mb/google/octopus: Add yorp variant

This creates a yorp variant for octopus; nothing too interesting now,
just picks up values from the baseboard.

BUG=b:74443669,b:74067452
TEST=Build

Change-Id: I55af8f02d33138a3b6bab7860a665e3deb5595c2
Signed-off-by: Justin TerAvest <teravest@chromium.org>
Reviewed-on: https://review.coreboot.org/25086
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

@@ -2,3 +2,7 @@ config BOARD_GOOGLE_OCTOPUS
 	bool "Octopus"
 	select BOARD_GOOGLE_BASEBOARD_OCTOPUS
 	select BASEBOARD_OCTOPUS_LAPTOP
+config BOARD_GOOGLE_YORP
+	bool "Yorp"
+	select BOARD_GOOGLE_BASEBOARD_OCTOPUS
+	select BASEBOARD_OCTOPUS_LAPTOP