ipa: ipu3: Retain Camera::controls() after ipa->configure()

Similar to what commit acfd602767 ("ipa: rkisp1: Fix algorithm controls
vanish after configure") did for the RkISP1 IPA, replace the usage of
unordered_map::merge() at updateControls() time with
unordered_map::insert().

As unordered_map::merge moves items from the source map, it deletes
controls registered at algorithms initialization time in the
ipaContext.ctrlMap. As at configure() time updateControls() is called
again and the list of Camera controls is refreshed, the controls
registered at algorithms initialization time are lost.

Fixes: 87353f2bba ("ipa: ipu3: Derive ipu3::algorithms::Agc from AgcMeanLuminance")
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/ipa/ipu3/ipu3.cpp

@@ -285,7 +285,7 @@ void IPAIPU3::updateControls(const IPACameraSensorInfo &sensorInfo,
 							       frameDurations[1],
 							       Span<const int64_t, 2>{ { frameDurations[2], frameDurations[2] } });
 
-	controls.merge(context_.ctrlMap);
+	controls.insert(context_.ctrlMap.begin(), context_.ctrlMap.end());
 	*ipaControls = ControlInfoMap(std::move(controls), controls::controls);
 }