[PATCH v2] drm/nouveau: only call ttm_agp_tt_create when __OS_HAS_AGP

[Max Filippov <jcmvbkbc@gmail.com>]

ttm_agp_tt_create is itself defined under CONFIG_AGP, so there's no
point calling it otherwise.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
---
This fixes allmodconfig build failure for xtensa: http://kisskb.ellerman.id.au/kisskb/buildresult/7346547/

 drivers/gpu/drm/nouveau/nouveau_bo.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 259e5f1..35ac57f 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -456,6 +456,7 @@ static struct ttm_tt *
 nouveau_ttm_tt_create(struct ttm_bo_device *bdev, unsigned long size,
 		      uint32_t page_flags, struct page *dummy_read)
 {
+#if __OS_HAS_AGP
 	struct nouveau_drm *drm = nouveau_bdev(bdev);
 	struct drm_device *dev = drm->dev;
 
@@ -463,6 +464,7 @@ nouveau_ttm_tt_create(struct ttm_bo_device *bdev, unsigned long size,
 		return ttm_agp_tt_create(bdev, dev->agp->bridge, size,
 					 page_flags, dummy_read);
 	}
+#endif
 
 	return nouveau_sgdma_create_ttm(bdev, size, page_flags, dummy_read);
 }
-- 
1.7.7.6