[PATCH -mm] fix wrong /proc/cpuinfo output

[Akinobu Mita <akinobu.mita@gmail.com>]

This patch fixes the problem introduced by:
http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc8/2.6.23-rc8-mm2/broken-out/x86-convert-cpuinfo_x86-array-to-a-per_cpu-array.patch

The problem is that every processor line in /proc/cpuinfo displays zero
on x86_64.

$ grep processor /proc/cpuinfo
processor       : 0
processor       : 0

Because early_identify_cpu() overwrites c->cpu_index for every cpuinfo.
This patch removes that unnecessary initialization for c->cpu_index.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>

Index: 2.6-mm/arch/x86_64/kernel/setup.c
===================================================================
--- 2.6-mm.orig/arch/x86_64/kernel/setup.c
+++ 2.6-mm/arch/x86_64/kernel/setup.c
@@ -967,7 +967,6 @@ void __cpuinit early_identify_cpu(struct
 
 #ifdef CONFIG_SMP
 	c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
-	c->cpu_index = 0;
 #endif
 	/* AMD-defined flags: level 0x80000001 */
 	xlvl = cpuid_eax(0x80000000);