Use local APIC ID from local APIC instead of CPUID

From: ravikiran thirumalai <kiran@scalex86.org>

vSMPowered systems use apic_cluster too.  Forcing apic_physflat works
on these systems too, but only if we change phys_pkg_id to use
hard_smp_prcoessor_id() instead of cpuid_ebx.  I am guessing other
multichassi cluster systems would need this too.  

Signed-off-by: ravikiran thirumalai <kiran@scalex86.org>
Signed-off-by: Andi Kleen <ak@suse.de>

---
 arch/x86_64/kernel/genapic_flat.c |    5 +----
 1 files changed, 1 insertion(+), 4 deletions(-)

Index: linux/arch/x86_64/kernel/genapic_flat.c
===================================================================
--- linux.orig/arch/x86_64/kernel/genapic_flat.c
+++ linux/arch/x86_64/kernel/genapic_flat.c
@@ -108,10 +108,7 @@ static unsigned int flat_cpu_mask_to_api
 
 static unsigned int phys_pkg_id(int index_msb)
 {
-	u32 ebx;
-
-	ebx = cpuid_ebx(1);
-	return ((ebx >> 24) & 0xFF) >> index_msb;
+	return hard_smp_processor_id() >> index_msb;
 }
 
 struct genapic apic_flat =  {