baytrail: bring up APs

Bring up the APs using x86 MP infrastructure.

BUG=chrome-os-partner:22862
BRANCH=None
TEST=Built and booted rambi. Noted all cores are brought up.

Change-Id: I9231eff5494444e8eb17ecdc5a0af72a2e5208b5
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/173704
Reviewed-on: http://review.coreboot.org/4889
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

src/soc/intel/baytrail/chip.c

@@ -40,18 +40,13 @@ static struct device_operations pci_domain_ops = {
 	.ops_pci_bus      = pci_bus_default_ops,
 };
 
-static void cpu_bus_init(device_t dev)
-{
-	printk(BIOS_DEBUG, "cpu_bus_init()\n");
-}
-
 static void cpu_bus_noop(device_t dev) { }
 
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = cpu_bus_noop,
 	.set_resources    = cpu_bus_noop,
 	.enable_resources = cpu_bus_noop,
-	.init             = cpu_bus_init,
+	.init             = baytrail_init_cpus,
 	.scan_bus         = NULL,
 };