media: adv7180: Split device initialization and reset

media: adv7180: Split device initialization and reset

The two different tasks of resetting and initializing the devices, and
configured the video formats are grouped lumped together in a single
function. These two tasks are then only performed at probe time, or when
resuming from suspend. Configuration of formats are then done directly
by the IOCTL callbacks, such as .set_fmt.

Prepare for reworking the driver to only reset the device at probe and
resume, and configuring all video formats in .s_stream instead of in
each IOCTL callback by splitting the two tasks in two different
functions.

At this point there is no functional change.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>