drm/amdgpu: remove adev pointer from struct amdgpu_bo v2

It's completely pointless to have two pointers to the
device in the same structure.

v2: rename function to amdgpu_ttm_adev, fix typos

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 4e510092..1c874fd 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -465,7 +465,6 @@ struct amdgpu_bo {
 	 */
 	struct list_head		va;
 	/* Constant after initialization */
-	struct amdgpu_device		*adev;
 	struct drm_gem_object		gem_base;
 	struct amdgpu_bo		*parent;
 	struct amdgpu_bo		*shadow;
@@ -2127,6 +2126,11 @@ struct amdgpu_device {
 
 };
 
+static inline struct amdgpu_device *amdgpu_ttm_adev(struct ttm_bo_device *bdev)
+{
+	return container_of(bdev, struct amdgpu_device, mman.bdev);
+}
+
 bool amdgpu_device_is_px(struct drm_device *dev);
 int amdgpu_device_init(struct amdgpu_device *adev,
 		       struct drm_device *ddev,