x86, apic: Replace noop_check_apicid_used

noop_check_apicid_used() has the same implementation as
default_check_apicid_used() in the standard header file, so replace the
former with the latter.

Signed-off-by: David Rientjes <rientjes@google.com>
Link: http://lkml.kernel.org/r/alpine.DEB.2.02.1407302350450.17503@chino.kir.corp.google.com


Signed-off-by: H. Peter Anvin <hpa@zytor.com>