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/soc/mediatek/mt8173/memlayout.ld b/src/soc/mediatek/mt8173/memlayout.ld
index 4aece51..d9a6d83 100644
--- a/src/soc/mediatek/mt8173/memlayout.ld
+++ b/src/soc/mediatek/mt8173/memlayout.ld
@@ -30,7 +30,8 @@
 	FMAP_CACHE(0x00103800, 2K)
 	PRERAM_CBMEM_CONSOLE(0x00104000, 12K)
 	WATCHDOG_TOMBSTONE(0x00107000, 4)
-	PRERAM_CBFS_CACHE(0x00107004, 16K - 4)
+	PRERAM_CBFS_CACHE(0x00107004, 8K - 4)
+	CBFS_MCACHE(0x00109000, 8K)
 	TIMESTAMP(0x0010B000, 4K)
 	ROMSTAGE(0x0010C000, 92K)
 	STACK(0x00124000, 16K)