[ARM] attrib_alloc: fix outer cache flush end address

when allocating uncached pages, the outer cache should be flushed;
the end address should be specified in bytes, not in pages.

Change-Id: I3fe036f4f7e10e009f96567e3afeeef6ea603240
Signed-off-by: Gary King <gking@nvidia.com>

arch/arm/mm/attrib_alloc.c

@@ -121,6 +121,6 @@ struct page *arm_attrib_alloc_pages_exact_node(int nid, gfp_t gfp,
 			update_pte(p, prot);
 	}
 	base = page_to_phys(page);
-	outer_flush_range(base, base + (size >> PAGE_SHIFT));
+	outer_flush_range(base, base + size);
 	return page;
 }