[PATCH -next] drm/ttm/agp: Fix Wunused-variable warning

[YueHaibing]

If CONFIG_AGP is not set, gcc warns:

drivers/gpu/drm/radeon/radeon_ttm.c: In function ‘radeon_ttm_tt_bind’:
drivers/gpu/drm/radeon/radeon_ttm.c:692:24: warning: unused variable ‘rdev’ [-Wunused-variable]
  struct radeon_device *rdev = radeon_get_rdev(bdev);
                        ^~~~

Move it to ifdef block to fix this.

Signed-off-by: YueHaibing <yuehaibing at huawei.com>
---
 drivers/gpu/drm/radeon/radeon_ttm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index 31c63d339629..449e77eb75f9 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -689,9 +689,9 @@ static int radeon_ttm_tt_bind(struct ttm_bo_device *bdev,
 			      struct ttm_tt *ttm,
 			      struct ttm_resource *bo_mem)
 {
+#if IS_ENABLED(CONFIG_AGP)
 	struct radeon_device *rdev = radeon_get_rdev(bdev);
 
-#if IS_ENABLED(CONFIG_AGP)
 	if (rdev->flags & RADEON_IS_AGP)
 		return ttm_agp_bind(ttm, bo_mem);
 #endif
-- 
2.17.1