x86: don't call local_irq_enable before entering idle

the call to idle is guaranteed to do it.
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/smpboot_32.c

@@ -214,9 +214,6 @@ static void __cpuinit start_secondary(void *unused)
 	unlock_ipi_call_lock();
 	per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
 
-	/* We can take interrupts now: we're officially "up". */
-	local_irq_enable();
-
 	wmb();
 	cpu_idle();
 }