soc/intel/skylake: Perform CPU MP Init before FSP-S Init

As per BWG, CPU MP Init (loading ucode) should be done prior
to BIOS_RESET_CPL. Hence, pull MP Init to BS_DEV_INIT_CHIPS Entry
(before FSP-S call).

BUG=chrome-os-partner:62438
BRANCH=NONE
TEST=Boot to OS with all threads enabled.

Change-Id: Ia6f83d466fb27e1290da84abe7832dc814b5273a
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/18287
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/intel/skylake/chip.c

@@ -2,7 +2,7 @@
  * This file is part of the coreboot project.
  *
  * Copyright (C) 2014 Google Inc.
- * Copyright (C) 2015 Intel Corporation.
+ * Copyright (C) 2015-2017 Intel Corporation.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -49,7 +49,7 @@ static struct device_operations pci_domain_ops = {
 };
 
 static struct device_operations cpu_bus_ops = {
-	.init             = &soc_init_cpus,
+	.init             = DEVICE_NOOP,
 #if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
 	.acpi_fill_ssdt_generator = generate_cpu_entries,
 #endif