Hi Praveen
Yes, the note does say it's available in 7.4 SP10 - not sure why the SAP Library release note does not mention it.
We are on SP08 now and will only be upgrading in a month or two, so can't try it out to verify. But since you already have SP10 installed, why don't you try to create a receiver REST channel and see if the OAuth option is there?
Rgds
Eng Swee