ipa: rkisp1: Add constructor to the ipa context

Initialization using the initializer list is cumbersome and requires
modifications to the list whenever the context is modified. Fix that by
adding a proper constructor to the context.

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

src/ipa/rkisp1/ipa_context.h

@@ -180,6 +180,11 @@ struct IPAFrameContext : public FrameContext {
 };
 
 struct IPAContext {
+	IPAContext(unsigned int frameContextSize)
+		: hw(nullptr), frameContexts(frameContextSize)
+	{
+	}
+
 	const IPAHwSettings *hw;
 	IPACameraSensorInfo sensorInfo;
 	IPASessionConfiguration configuration;

src/ipa/rkisp1/rkisp1.cpp

@@ -124,7 +124,7 @@ const ControlInfoMap::Map rkisp1Controls{
 } /* namespace */
 
 IPARkISP1::IPARkISP1()
-	: context_({ {}, {}, {}, {}, { kMaxFrameContexts }, {}, {} })
+	: context_(kMaxFrameContexts)
 {
 }