soc/intel/baytrail: use mp_cpu_bus_init

Implement mp_init_cpus and use mp_cpu_bus_init as init function in
cpu_bus_ops.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I057ae8d95bdc510e9e7afb144b692531107fa45d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58506
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

src/soc/intel/baytrail/cpu.c

@@ -12,6 +12,7 @@
 #include <cpu/x86/msr.h>
 #include <cpu/x86/mtrr.h>
 #include <cpu/x86/smm.h>
+#include <device/device.h>
 #include <reg_script.h>
 #include <soc/iosf.h>
 #include <soc/msr.h>
@@ -193,10 +194,8 @@ static const struct mp_ops mp_ops = {
 	.post_mp_init        = post_mp_init,
 };
 
-void baytrail_init_cpus(struct device *dev)
+void mp_init_cpus(struct bus *cpu_bus)
 {
-	struct bus *cpu_bus = dev->link_list;
-
 	/* TODO: Handle mp_init_with_smm failure? */
 	mp_init_with_smm(cpu_bus, &mp_ops);
 }