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/mediatek/mt8173/i2c.c

@@ -70,7 +70,7 @@ static struct mtk_i2c i2c[7] = {
 
 #define I2CTAG                "[I2C][PL] "
 
-#if IS_ENABLED(CONFIG_DEBUG_I2C)
+#if CONFIG(DEBUG_I2C)
 #define I2CLOG(fmt, arg...)   printk(BIOS_INFO, I2CTAG fmt, ##arg)
 #else
 #define I2CLOG(fmt, arg...)