google/octopus: Disable bootblock console

The GLK bootblock seems(?) to be hard limited to 32KB and some Octopus
variants are so close to that that they only have 0.5KB left. This is
blocking development of new core features, so let's disable the
bootblock console to gain a couple of KB back (like we already did on
RK3288).

There are probably other opporunities for code size reduction here (e.g.
it seems that almost half(!) of that whole bootblock size is taken up by
devicetree.cb structures), but I'm not familiar enough with the platform
to dig into them.

Change-Id: I05b4ecf5abef7307e3d0a81db04a745ff3da0c42
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38521
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

@@ -22,6 +22,7 @@ config BOARD_GOOGLE_BASEBOARD_OCTOPUS
 	select MAINBOARD_HAS_SPI_TPM_CR50
 	select MAINBOARD_HAS_TPM2
 	select GOOGLE_SMBIOS_MAINBOARD_VERSION
+	select NO_BOOTBLOCK_CONSOLE
 	select NO_FMAP_CACHE
 
 if BOARD_GOOGLE_BASEBOARD_OCTOPUS