[PATCH] ppc64: Fix nasty typo in PTE freeing code

There is a typo in the PTE freeing code causing us to possibly
overflow the batch structure.

Obvious fix (look at the closing parentheses).

include/asm-ppc64/pgalloc.h

@@ -78,8 +78,8 @@ struct pte_freelist_batch
 	struct page *	pages[0];
 };
 
-#define PTE_FREELIST_SIZE	((PAGE_SIZE - sizeof(struct pte_freelist_batch) / \
-				  sizeof(struct page *)))
+#define PTE_FREELIST_SIZE	((PAGE_SIZE - sizeof(struct pte_freelist_batch)) / \
+				  sizeof(struct page *))
 
 extern void pte_free_now(struct page *ptepage);
 extern void pte_free_submit(struct pte_freelist_batch *batch);