iommu/vt-d: Convert missing apic.c intr-remapping call to remap_ops

Convert these calls too:

	* Disable of remapping hardware
	* Reenable of remapping hardware
	* Enable fault handling

With that all of arch/x86/kernel/apic/apic.c is converted to
use the generic intr-remapping interface.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
diff --git a/drivers/iommu/intr_remapping.h b/drivers/iommu/intr_remapping.h
index d6df732..2744c9a 100644
--- a/drivers/iommu/intr_remapping.h
+++ b/drivers/iommu/intr_remapping.h
@@ -37,6 +37,15 @@
 
 	/* Enables the remapping hardware */
 	int  (*hardware_enable)(void);
+
+	/* Disables the remapping hardware */
+	void (*hardware_disable)(void);
+
+	/* Reenables the remapping hardware */
+	int  (*hardware_reenable)(int);
+
+	/* Enable fault handling */
+	int  (*enable_faulting)(void);
 };
 
 extern struct irq_remap_ops intel_irq_remap_ops;