x86-64: Move cpu number from PDA to per-cpu and consolidate with 32-bit.

tj: moved cpu_number definition out of CONFIG_HAVE_SETUP_PER_CPU_AREA
    for voyager.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

arch/x86/kernel/asm-offsets_64.c

@@ -53,7 +53,6 @@ int main(void)
 	ENTRY(oldrsp); 
 	ENTRY(pcurrent); 
 	ENTRY(irqcount);
-	ENTRY(cpunumber);
 	DEFINE(pda_size, sizeof(struct x8664_pda));
 	BLANK();
 #undef ENTRY