arch/non-x86: Use ENV_ROMSTAGE_OR_BEFORE

Change-Id: I9dbf0fc14516f766fd164c7308906456f2865e89
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34982
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/arch/riscv/include/arch/memlayout.h

@@ -20,7 +20,7 @@
 
 #define STACK(addr, size) REGION(stack, addr, size, 4096)
 
-#if defined(__PRE_RAM__)
+#if ENV_ROMSTAGE_OR_BEFORE
 	#define CAR_STACK(addr, size) \
 		REGION(car_stack, addr, size, 4K) \
 		ALIAS_REGION(car_stack, stack)