Documentation/auxiliary_bus: Clarify the release of devices from find device

auxiliary_find_device() takes a proper get_device() reference on the
device before returning the matched device.

Users of this call should be informed that they need to properly release
this reference with put_device().
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Link: https://lore.kernel.org/r/20211202044305.4006853-7-ira.weiny@intel.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/auxiliary.c

@@ -202,6 +202,8 @@ EXPORT_SYMBOL_GPL(__auxiliary_device_add);
  * This function returns a reference to a device that is 'found'
  * for later use, as determined by the @match callback.
  *
+ * The reference returned should be released with put_device().
+ *
  * The callback should return 0 if the device doesn't match and non-zero
  * if it does.  If the callback returns non-zero, this function will
  * return to the caller and not iterate over any more devices.