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/soc/intel/common/vbt.c

@@ -22,7 +22,7 @@
 
 void *vbt_get(void)
 {
-	if (!IS_ENABLED(CONFIG_RUN_FSP_GOP))
+	if (!CONFIG(RUN_FSP_GOP))
 		return NULL;
 
 	/* Normal mode and S3 resume path PEIM GFX init is not needed.