KVM: VMX: Add constant for invalid guest state exit reason

For the sake of completeness, this patch adds a symbolic
constant for VMX exit reason 0x21 (invalid guest state).
Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

arch/x86/include/asm/vmx.h

@@ -257,6 +257,7 @@ enum vmcs_field {
 #define EXIT_REASON_IO_INSTRUCTION      30
 #define EXIT_REASON_MSR_READ            31
 #define EXIT_REASON_MSR_WRITE           32
+#define EXIT_REASON_INVALID_STATE	33
 #define EXIT_REASON_MWAIT_INSTRUCTION   36
 #define EXIT_REASON_MONITOR_INSTRUCTION 39
 #define EXIT_REASON_PAUSE_INSTRUCTION   40