Clean up merge problems with illumos#11083 (nfs-zone)

@@ -51,10 +51,11 @@
 #include <sys/secflags.h>
 #include <sys/cpu_uarray.h>
 #include <sys/nvpair.h>
 #include <sys/list.h>
 #include <sys/loadavg.h>
+#include <sys/vnode.h>
 #endif  /* _KERNEL */
 
 #ifdef  __cplusplus
 extern "C" {
 #endif