nfsd: use exp_put() for svc_export_cache put

This patch replaces cache_put() call for svc_export_cache by exp_put() call.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index 68454e7..cc79300 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -636,7 +636,7 @@
 #endif
 	}
 	if (exp) {
-		cache_put(&exp->h, &svc_export_cache);
+		exp_put(exp);
 		fhp->fh_export = NULL;
 	}
 	return;