powerpc/mpc8xxx: use topology registers to calculate number of cores

We have actual topology infomation to find out exactly which core is present.
Calculate the number of cores if not specified.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index a8ffedb..3247c80 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -1157,6 +1157,7 @@
 };
 
 struct cpu_type *identify_cpu(u32 ver);
+int fixup_cpu(void);
 
 #if defined(CONFIG_MPC85xx) || defined(CONFIG_MPC86xx)
 #define CPU_TYPE_ENTRY(n, v, nc) \