x86, apic: refactor ->get_apic_id() & GET_APIC_ID()

- spread out the namespace on a per driver basis

 - get rid of macro wrappers

 - small cleanups

Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/mach-generic/default.c b/arch/x86/mach-generic/default.c
index e5f85cd..d51a3f0 100644
--- a/arch/x86/mach-generic/default.c
+++ b/arch/x86/mach-generic/default.c
@@ -71,7 +71,7 @@
 	.phys_pkg_id			= default_phys_pkg_id,
 	.mps_oem_check			= NULL,
 
-	.get_apic_id			= get_apic_id,
+	.get_apic_id			= default_get_apic_id,
 	.set_apic_id			= NULL,
 	.apic_id_mask			= APIC_ID_MASK,