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/drivers/i2c/designware/dw_i2c.h

@@ -20,7 +20,7 @@
 #include <device/i2c.h>
 #include <stdint.h>
 
-#if IS_ENABLED(CONFIG_DRIVERS_I2C_DESIGNWARE_DEBUG)
+#if CONFIG(DRIVERS_I2C_DESIGNWARE_DEBUG)
 #define DW_I2C_DEBUG BIOS_DEBUG
 
 #else