drivers/base: Extend documentation with preferred way to use auxbus

 *		},

 *		.ops = my_custom_ops,

 *	};

 *

 * Please note that such custom ops approach is valid, but it is hard to implement

 * it right without global locks per-device to protect from auxiliary_drv removal

 * during call to that ops. In addition, this implementation lacks proper module

 * dependency, which causes to load/unload races between auxiliary parent and devices

 * modules.

 *

 * The most easiest way to provide these ops reliably without needing to

 * have a lock is to EXPORT_SYMBOL*() them and rely on already existing

 * modules infrastructure for validity and correct dependencies chains.

 */

static const struct auxiliary_device_id *auxiliary_match_id(const struct auxiliary_device_id *id,