I am running Photoshop CS6 and Adobe Camera RAW 8.2
Help/Updates in CS6 tells me that I am fully up to date.
So, are these features exclusive to Photoshop CC?
Yes, those functionalities (amongst others) will not be enabled for CS6.
Of course other Rawconverters (RawTherapee / Capture One Pro) can deal with dust in a more fool-proof and fundamental fashion, with a separately shot LLC image that was tweaked to address dust shadows.