arch/tile: don't leak kernel memory when we unload modules

We were failing to track the memory when we allocated it.
Signed-off-by: NChris Metcalf <cmetcalf@tilera.com>

arch/tile/kernel/module.c

@@ -67,6 +67,8 @@ void *module_alloc(unsigned long size)
 	area = __get_vm_area(size, VM_ALLOC, MEM_MODULE_START, MEM_MODULE_END);
 	if (!area)
 		goto error;
+	area->nr_pages = npages;
+	area->pages = pages;
 
 	if (map_vm_area(area, prot_rwx, &pages)) {
 		vunmap(area->addr);