drm/ttm: drop priv pointer in memory manager

 * @default_caching: The default caching policy used for a buffer object

 * placed in this memory type if the user doesn't provide one.

 * @func: structure pointer implementing the range manager. See above

 * @priv: Driver private closure for @func.

 * @io_reserve_mutex: Mutex optionally protecting shared io_reserve structures

 * @use_io_reserve_lru: Use an lru list to try to unreserve io_mem_regions

 * reserved by the TTM vm system.

	uint32_t available_caching;

	uint32_t default_caching;

	const struct ttm_mem_type_manager_func *func;

	void *priv;

	struct mutex io_reserve_mutex;

	bool use_io_reserve_lru;

	spinlock_t move_lock;