media: ipu-bridge: Drop early setting of sensor->adev

sensor->adev is no longer dereferenced before it is permanently set by:

	sensor->adev = acpi_dev_get(adev);

So the early assignment with a borrowed reference can be dropped.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>