[XTENSA] Fix non-existent pte_token_t typedef to pgtable_t

This bug was introduced in 2f569afd.
(CONFIG_HIGHPTE vs. sub-page page tables)
Signed-off-by: NChris Zankel <chris@zankel.net>

include/asm-xtensa/pgalloc.h

@@ -47,7 +47,7 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
 	return kmem_cache_alloc(pgtable_cache, GFP_KERNEL|__GFP_REPEAT);
 }
 
-static inline pte_token_t pte_alloc_one(struct mm_struct *mm,
+static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
 					unsigned long addr)
 {
 	struct page *page;