ipa: Pass IPA initialization settings to IPAInterface::init()

Add a new IPASettings class to pass IPA initialization settings through
the IPAInterface::init() method. The settings currently only contain the
name of a configuration file, and are expected to be extended later.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

src/ipa/vimc/vimc.cpp

@@ -31,7 +31,7 @@ public:
 	IPAVimc();
 	~IPAVimc();
 
-	int init() override;
+	int init(const IPASettings &settings) override;
 
 	int start() override;
 	void stop() override;
@@ -61,7 +61,7 @@ IPAVimc::~IPAVimc()
 		::close(fd_);
 }
 
-int IPAVimc::init()
+int IPAVimc::init(const IPASettings &settings)
 {
 	trace(IPAOperationInit);