nfsd: Fix independence of a few nfsd related headers

An header should be compilation independent, .i.e pull in
any header who's declarations are directly used by this header.
And not let users re-include all it's dependencies all over
again.

[At the end of the day what's the use of a header if it does
 not have more then one user?]

Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
diff --git a/include/linux/nfsacl.h b/include/linux/nfsacl.h
index 43011b6..f321b57 100644
--- a/include/linux/nfsacl.h
+++ b/include/linux/nfsacl.h
@@ -29,6 +29,7 @@
 #ifdef __KERNEL__
 
 #include <linux/posix_acl.h>
+#include <linux/sunrpc/xdr.h>
 
 /* Maximum number of ACL entries over NFS */
 #define NFS_ACL_MAX_ENTRIES	1024