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/mainboard/google/foster/chromeos.c

@@ -68,7 +68,7 @@ void fill_lb_gpios(struct lb_gpios *gpios)
 
 int get_recovery_mode_switch(void)
 {
-#if IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC)
+#if CONFIG(EC_GOOGLE_CHROMEEC)
 	uint64_t ec_events;
 
 	ec_events = google_chromeec_get_events_b();