nfsd: add dprintk of compound return

We already print each operation of the compound when debugging is turned
on; printing the result could also help with remote debugging.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index c309c88..3134843 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -952,6 +952,7 @@
 out:
 	nfsd4_release_compoundargs(args);
 	cstate_free(cstate);
+	dprintk("nfsv4 compound returned %d\n", ntohl(status));
 	return status;
 }