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>

test/ipa/ipa_interface_test.cpp

@@ -98,7 +98,8 @@ protected:
 		}
 
 		/* Test initialization of IPA module. */
-		ipa_->init();
+		IPASettings settings;
+		ipa_->init(settings);
 		timer.start(1000);
 		while (timer.isRunning() && trace_ != IPAOperationInit)
 			dispatcher->processEvents();