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/rockchip/rk3399/soc.c b/src/soc/rockchip/rk3399/soc.c
index 6e5e1a7..65b791d 100644
--- a/src/soc/rockchip/rk3399/soc.c
+++ b/src/soc/rockchip/rk3399/soc.c
@@ -49,7 +49,7 @@
 	 */
 	mmio_resource(dev, 1, (TZRAM_BASE / KiB), (TZRAM_SIZE / KiB));
 
-	if (IS_ENABLED(CONFIG_MAINBOARD_DO_NATIVE_VGA_INIT) && display_init_required())
+	if (CONFIG(MAINBOARD_DO_NATIVE_VGA_INIT) && display_init_required())
 		rk_display_init(dev);
 	else
 		printk(BIOS_INFO, "Display initialization disabled.\n");