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/apollolake/meminit.c

@@ -166,7 +166,7 @@ static const struct fsp_speed_profiles glk_profile = {
 
 static const struct fsp_speed_profiles *get_fsp_profile(void)
 {
-	if (IS_ENABLED(CONFIG_SOC_INTEL_GLK))
+	if (CONFIG(SOC_INTEL_GLK))
 		return &glk_profile;
 	else
 		return &apl_profile;