HID: hid-sensor-hub: Move 'hsdev' description to correct struct definition

HID: hid-sensor-hub: Move 'hsdev' description to correct struct definition

Fixes the following W=1 kernel build warning(s):

 drivers/hid/hid-sensor-hub.c:54: warning: Function parameter or member 'hsdev' not described in 'hid_sensor_hub_callbacks_list'

Cc: Jiri Kosina <jikos@kernel.org>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: linux-input@vger.kernel.org
Cc: linux-iio@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>