ipmi: Remove usecount function from interfaces

	 * block.

	 */

	void (*set_maintenance_mode)(void *send_info, bool enable);

	/*

	 * Tell the handler that we are using it/not using it.  The

	 * message handler get the modules that this handler belongs

	 * to; this function lets the SMI claim any modules that it

	 * uses.  These may be NULL if this is not required.

	 */

	int (*inc_usecount)(void *send_info);

	void (*dec_usecount)(void *send_info);

};

struct ipmi_device_id {