[welcomeq] Adjust to Config-API that QmlViewStep expects

src/modules/welcomeq/WelcomeQmlViewStep.cpp

@@ -167,8 +167,8 @@ WelcomeQmlViewStep::checkRequirements()
 	return m_requirementsChecker->checkRequirements();
 }
 
-Config*
-WelcomeQmlViewStep::config() const
+QObject*
+WelcomeQmlViewStep::getConfig()
 {
 	return m_config;
 }

src/modules/welcomeq/WelcomeQmlViewStep.h

@@ -71,7 +71,7 @@ public:
     void setCountry( const QString&, CalamaresUtils::GeoIP::Handler* handler );
 
     Calamares::RequirementsList checkRequirements() override;
-    Config* config() const;
+    QObject* getConfig() override;
 
 private:
     // TODO: a generic QML viewstep should return a config object from a method