KVM: Only x86 has pio

Signed-off-by: Avi Kivity <avi@qumranet.com>

virt/kvm/kvm_main.c

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 04595fe..121e65c 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -678,8 +678,10 @@
 
 	if (vmf->pgoff == 0)
 		page = virt_to_page(vcpu->run);
+#ifdef CONFIG_X86
 	else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET)
 		page = virt_to_page(vcpu->arch.pio_data);
+#endif
 	else
 		return VM_FAULT_SIGBUS;
 	get_page(page);