x86: change GET_APIC_ID() from an inline function to an out-of-line function

Introduce a function to read the local APIC_ID.

This change is in preparation for additional changes to
the APICID functions that will come in a later patch.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index f45d740..5da35d2 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -237,7 +237,7 @@
 	/*
 	 * (This works even if the APIC is not enabled.)
 	 */
-	phys_id = GET_APIC_ID(apic_read(APIC_ID));
+	phys_id = GET_APIC_ID(read_apic_id());
 	cpuid = smp_processor_id();
 	if (cpu_isset(cpuid, cpu_callin_map)) {
 		panic("%s: phys CPU#%d, CPU#%d already present??\n", __func__,
@@ -1205,9 +1205,9 @@
 		return;
 	}
 
-	if (GET_APIC_ID(apic_read(APIC_ID)) != boot_cpu_physical_apicid) {
+	if (GET_APIC_ID(read_apic_id()) != boot_cpu_physical_apicid) {
 		panic("Boot APIC ID in local APIC unexpected (%d vs %d)",
-		     GET_APIC_ID(apic_read(APIC_ID)), boot_cpu_physical_apicid);
+		     GET_APIC_ID(read_apic_id()), boot_cpu_physical_apicid);
 		/* Or can we switch back to PIC here? */
 	}