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>
diff --git a/src/soc/amd/stoneyridge/ramtop.c b/src/soc/amd/stoneyridge/ramtop.c
index d805683..edd5c239 100644
--- a/src/soc/amd/stoneyridge/ramtop.c
+++ b/src/soc/amd/stoneyridge/ramtop.c
@@ -36,7 +36,7 @@
 	return biosram_read32(BIOSRAM_CBMEM_TOP);
 }
 
-#if IS_ENABLED(CONFIG_ACPI_BERT)
+#if CONFIG(ACPI_BERT)
  #if CONFIG_SMM_TSEG_SIZE == 0x0
   #define BERT_REGION_MAX_SIZE 0x100000
  #else
@@ -49,7 +49,7 @@
 
 void bert_reserved_region(void **start, size_t *size)
 {
-	if (IS_ENABLED(CONFIG_ACPI_BERT))
+	if (CONFIG(ACPI_BERT))
 		*start = cbmem_top();
 	else
 		start = NULL;