x86: generalize boot_cpu_id

x86/Voyager can boot on non-zero processors. While that can probably
be fixed by properly remapping the physical CPU IDs, keep boot_cpu_id
for now for easier transition - and expand it to all of x86.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/smpboot.c

@@ -905,18 +905,6 @@ do_rest:
 	return boot_error;
 }
 
-#ifdef CONFIG_X86_64
-int default_cpu_present_to_apicid(int mps_cpu)
-{
-	return __default_cpu_present_to_apicid(mps_cpu);
-}
-
-int default_check_phys_apicid_present(int boot_cpu_physical_apicid)
-{
-	return __default_check_phys_apicid_present(boot_cpu_physical_apicid);
-}
-#endif
-
 int __cpuinit native_cpu_up(unsigned int cpu)
 {
 	int apicid = apic->cpu_present_to_apicid(cpu);