Fix ttm_page_alloc.c build breakage

The commit 1e8655f8
    drm/ttm: Fix build on architectures without AGP

looks at TTM_HAS_AGP before it has been set in ttm_bo_driver.h

Move the conditional inclusion of <asm/agp.h> *after* we have included
ttm_bo_driver.h
Signed-of-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/ttm/ttm_page_alloc.c

@@ -40,13 +40,13 @@
 #include <linux/slab.h>
 
 #include <asm/atomic.h>
-#ifdef TTM_HAS_AGP
-#include <asm/agp.h>
-#endif
 
 #include "ttm/ttm_bo_driver.h"
 #include "ttm/ttm_page_alloc.h"
 
+#ifdef TTM_HAS_AGP
+#include <asm/agp.h>
+#endif
 
 #define NUM_PAGES_TO_ALLOC		(PAGE_SIZE/sizeof(struct page *))
 #define SMALL_ALLOCATION		16