x86: set ->trampoline_phys_low/high on 64-bit too

64-bit x86 has zero for ->trampoline_phys_low/high, but the smpboot
code can use these values - so it's better to set them up to their
correct values.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/genx2apic_cluster.c b/arch/x86/kernel/genx2apic_cluster.c
index 2d97726..abc5ee3 100644
--- a/arch/x86/kernel/genx2apic_cluster.c
+++ b/arch/x86/kernel/genx2apic_cluster.c
@@ -228,8 +228,8 @@
 	.send_IPI_self			= x2apic_send_IPI_self,
 
 	.wakeup_cpu			= NULL,
-	.trampoline_phys_low		= 0,
-	.trampoline_phys_high		= 0,
+	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
+	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
 	.wait_for_init_deassert		= NULL,
 	.smp_callin_clear_local_apic	= NULL,
 	.store_NMI_vector		= NULL,