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/mt8183/memlayout.ld b/src/soc/mediatek/mt8183/memlayout.ld
index a266377..db56666 100644
--- a/src/soc/mediatek/mt8183/memlayout.ld
+++ b/src/soc/mediatek/mt8183/memlayout.ld
@@ -30,7 +30,8 @@
 
 	SRAM_L2C_START(0x00200000)
 	OVERLAP_DECOMPRESSOR_VERSTAGE_ROMSTAGE(0x00201000, 188K)
-	BOOTBLOCK(0x00230000, 64K)
+	BOOTBLOCK(0x00230000, 56K)
+	CBFS_MCACHE(0x0023e000, 8K)
 	DRAM_INIT_CODE(0x00240000, 208K)
 	PRERAM_CBFS_CACHE(0x00274000, 48K)
 	SRAM_L2C_END(0x00280000)