treewide: Replace CONFIG(ARCH_xx) tests

Once we support building stages for different architectures,
such CONFIG(ARCH_xx) tests do not evaluate correctly anymore.

Change-Id: I599995b3ed5c4dfd578c87067fe8bfc8c75b9d43
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42183
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/lib/ramtest.c b/src/lib/ramtest.c
index 489ca28..c6cd7a4 100644
--- a/src/lib/ramtest.c
+++ b/src/lib/ramtest.c
@@ -3,7 +3,7 @@
 #include <console/console.h>
 #include <device/mmio.h>
 
-#if CONFIG(ARCH_X86) && CONFIG(SSE2)
+#if ENV_X86 && CONFIG(SSE2)
 /* Assembler in lib/ is ugly. */
 static void write_phys(uintptr_t addr, u32 value)
 {