In ncl_printf(), call vprintf() instead of printf().

MFC after:	3 days

sys/fs/nfsclient/nfs_clsubs.c

@@ -167,7 +167,7 @@ ncl_printf(const char *fmt, ...)
 
 	mtx_lock(&Giant);
 	va_start(ap, fmt);
-	printf(fmt, ap);
+	vprintf(fmt, ap);
 	va_end(ap);
 	mtx_unlock(&Giant);
 }