media: intel/ipu6: input system ABI between firmware and driver

Implement the input system firmware ABIs in the ISYS driver, including
stream configuration, control command, capture request and response.
Signed-off-by: Bingbu Cao <bingbu.cao@intel.com>
Co-developed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>