memlayout.ld: Increase RAMSTAGE size to more than 1MB everywhere

This is in preparation of a larger heap. I went for 2MB because why not?

Change-Id: I51f999a10ba894a7f2f5fce224d30bf914107c38
Signed-off-by: Patrick Georgi <patrick@coreboot.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78273
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>
diff --git a/src/mainboard/emulation/spike-riscv/memlayout.ld b/src/mainboard/emulation/spike-riscv/memlayout.ld
index 7ec4892..b74c0bb 100644
--- a/src/mainboard/emulation/spike-riscv/memlayout.ld
+++ b/src/mainboard/emulation/spike-riscv/memlayout.ld
@@ -16,5 +16,5 @@
 	/* hole at (START + 8M + 14K, 50K) */
 	ROMSTAGE(START + 8M + 64K, 128K)
 	PRERAM_CBMEM_CONSOLE(START + 8M + 192k, 8K)
-	RAMSTAGE(START + 8M + 200K, 256K)
+	RAMSTAGE(START + 8M + 200K, 2M)
 }