KVM: MMU: Don't track nested fault info in error-code

This patch moves the detection whether a page-fault was
nested or not out of the error code and moves it into a
separate variable in the fault struct.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 80224bf..519d6f7 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -322,6 +322,7 @@
 	struct {
 		u64      address;
 		unsigned error_code;
+		bool     nested;
 	} fault;
 
 	/* only needed in kvm_pv_mmu_op() path, but it's hot so