irq_remap: Fix UP build failure

Fix the below UP build failure with CONFIG_IRQ_REMAP enabled.

 drivers/iommu/intel_irq_remapping.c:955:19: error: ‘struct irq_data’ has no member named ‘affinity’

Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: joro@8bytes.org
Cc: iommu@lists.linux-foundation.org
Cc: Joerg Roedel <joerg.roedel@amd.com>
Link: http://lkml.kernel.org/r/1336460934-23592-2-git-send-email-suresh.b.siddha@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index b4d39507..1c0255e 100644
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -902,6 +902,7 @@
 	return 0;
 }
 
+#ifdef CONFIG_SMP
 /*
  * Migrate the IO-APIC irq in the presence of intr-remapping.
  *
@@ -955,6 +956,7 @@
 	cpumask_copy(data->affinity, mask);
 	return 0;
 }
+#endif
 
 static void intel_compose_msi_msg(struct pci_dev *pdev,
 				  unsigned int irq, unsigned int dest,
@@ -1056,7 +1058,9 @@
 	.reenable		= reenable_irq_remapping,
 	.enable_faulting	= enable_drhd_fault_handling,
 	.setup_ioapic_entry	= intel_setup_ioapic_entry,
+#ifdef CONFIG_SMP
 	.set_affinity		= intel_ioapic_set_affinity,
+#endif
 	.free_irq		= free_irte,
 	.compose_msi_msg	= intel_compose_msi_msg,
 	.msi_alloc_irq		= intel_msi_alloc_irq,