coreboot: Replace all IS_ENABLED(CONFIG_XXX) with CONFIG(XXX)

This patch is a raw application of

 find src/ -type f | xargs sed -i -e 's/IS_ENABLED\s*(CONFIG_/CONFIG(/g'

Change-Id: I6262d6d5c23cabe23c242b4f38d446b74fe16b88
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31774
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/include/option.h

@@ -6,7 +6,7 @@
  * storage can be used. This will benefit machines without CMOS as well as those
  * without a battery-backed CMOS (e.g. some laptops).
  */
-#if IS_ENABLED(CONFIG_USE_OPTION_TABLE)
+#if CONFIG(USE_OPTION_TABLE)
 #include <pc80/mc146818rtc.h>
 #else
 #include <types.h>