cbfs: Enable CBFS mcache on most chipsets

This patch flips the default of CONFIG_NO_CBFS_MCACHE so the feature is
enabled by default. Some older chipsets with insufficient SRAM/CAR space
still have it explicitly disabled. All others get the new section added
to their memlayout... 8K seems like a sane default to start with.

Change-Id: I0abd1c813aece6e78fb883f292ce6c9319545c44
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38424
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
diff --git a/src/mainboard/lenovo/t400/Kconfig b/src/mainboard/lenovo/t400/Kconfig
index 5b3ecf1..809ea45 100644
--- a/src/mainboard/lenovo/t400/Kconfig
+++ b/src/mainboard/lenovo/t400/Kconfig
@@ -26,6 +26,7 @@
 	select MAINBOARD_HAS_LIBGFXINIT
 	select MAINBOARD_USES_IFD_GBE_REGION if !BOARD_LENOVO_R500
 	select INTEL_GMA_HAVE_VBT
+	select NO_CBFS_MCACHE
 
 config VBOOT
 	select VBOOT_VBNV_CMOS