x86, pgtable.h: fix 2-level 32-bit build

- pmd_flags() needs to be available on 2-levels too
- provide pud_large() wrapper as well
- include page.h - it provides basic types relied on by pgtable.h

Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/include/asm/page.h b/arch/x86/include/asm/page.h
index 0b16b64..823cc93 100644
--- a/arch/x86/include/asm/page.h
+++ b/arch/x86/include/asm/page.h
@@ -139,10 +139,6 @@
 	return pmd.pmd;
 }
 
-static inline pmdval_t pmd_flags(pmd_t pmd)
-{
-	return native_pmd_val(pmd) & PTE_FLAGS_MASK;
-}
 #else  /* PAGETABLE_LEVELS == 2 */
 #include <asm-generic/pgtable-nopmd.h>
 
@@ -152,6 +148,11 @@
 }
 #endif	/* PAGETABLE_LEVELS >= 3 */
 
+static inline pmdval_t pmd_flags(pmd_t pmd)
+{
+	return native_pmd_val(pmd) & PTE_FLAGS_MASK;
+}
+
 static inline pte_t native_make_pte(pteval_t val)
 {
 	return (pte_t) { .pte = val };