This patch adds support for registering a sensor sub-device to the async
sub-device framework and parse set up common sensor related devices such as
actuator/VCM.

[Sakari Ailus: Rewrap commit message]
Signed-off-by: Dongchun Zhu <dongchun.zhu@mediatek.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>