Damn Microsoft marketing branding...

Always-On Failover Cluster Instances is one thing and Always-On availability Groups is another one. Together they're branded as "Always-On".

Since failover clustering had been around for 15 years, when SQL Server 2012 came out with his Always-On features, everybody refers to Always-On Availability Groups as simply Always-On.

/RANT

Long story short: you don't need to configure anything for always on if you're planning to install a failover cluster.