KVM: Fix signature of kvm_iommu_map_pages stub

Breaks otherwise if CONFIG_IOMMU_API is not set.

KVM-Stable-Tag.
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>

include/linux/kvm_host.h

@@ -483,8 +483,7 @@ int kvm_deassign_device(struct kvm *kvm,
 			struct kvm_assigned_dev_kernel *assigned_dev);
 #else /* CONFIG_IOMMU_API */
 static inline int kvm_iommu_map_pages(struct kvm *kvm,
-				      gfn_t base_gfn,
-				      unsigned long npages)
+				      struct kvm_memory_slot *slot)
 {
 	return 0;
 }