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/quark/sd.c

@@ -23,7 +23,7 @@
 static void init(struct device *dev)
 {
 	/* Run the SD test */
-	if (IS_ENABLED(CONFIG_STORAGE_TEST)) {
+	if (CONFIG(STORAGE_TEST)) {
 		uint32_t bar;
 		uint32_t previous_bar;
 		uint16_t previous_command;