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/emulation/qemu-riscv/memlayout.ld b/src/mainboard/emulation/qemu-riscv/memlayout.ld
index cfa0513..96ab74c 100644
--- a/src/mainboard/emulation/qemu-riscv/memlayout.ld
+++ b/src/mainboard/emulation/qemu-riscv/memlayout.ld
@@ -25,6 +25,7 @@
 #endif
 	PRERAM_CBMEM_CONSOLE(STAGES_START + 128K, 8K)
 	FMAP_CACHE(STAGES_START + 136K, 2K)
+	CBFS_MCACHE(STAGES_START + 138K, 8K)
 	RAMSTAGE(STAGES_START + 200K, 16M)
 	STACK(STAGES_START + 200K + 16M, 4K)
 }