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>

arch/x86/include/asm/smp.h

@@ -189,7 +189,7 @@ static inline unsigned int read_apic_id(void)
 
 	reg = *(u32 *)(APIC_BASE + APIC_ID);
 
-	return GET_APIC_ID(reg);
+	return apic->get_apic_id(reg);
 }
 #endif