ipa: rksip1: Remove setControls(0) to reduce startup oscillations

The call to setControls(0) is counter productive. At start() time, no
requests were queued and no stats were received. So setControls(0)
accesses a zeroed frame context and in turn sends 0 as gain, exposure
and vblank to the pipeline handler and DelayedControls. This leads to
strong oscillations on every start of the camera.

A proper fix for handling the startup controls still needs to be done
and was already started in [1] and [2].

From a DelayedControls point of view the call to setControls(0) is also
unnecessary as DelayedControls treat frame 0 as already being queued in
after initialization.

So it is safe to just remove it and the removal fixes the zero
effectiveExposureValue discussed in the previous patch for rkisp1.

[1]: https://patchwork.libcamera.org/patch/21708/
[2]: https://patchwork.libcamera.org/patch/22445/

Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/ipa/rkisp1/rkisp1.cpp

@@ -211,8 +211,7 @@ int IPARkISP1::init(const IPASettings &settings, unsigned int hwRevision,
 
 int IPARkISP1::start()
 {
-	setControls(0);
-
+	/* \todo Properly handle startup controls. */
 	return 0;
 }