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/memmap.c

@@ -30,7 +30,7 @@ void *cbmem_top(void)
 	const config_t *config;
 	void *tolum = (void *)sa_get_tseg_base();
 
-	if (!IS_ENABLED(CONFIG_SOC_INTEL_GLK))
+	if (!CONFIG(SOC_INTEL_GLK))
 		return tolum;
 
 	dev = dev_find_slot(0, PCH_DEVFN_LPC);