I think you're confusing this with WiFi. The Nordic Semiconductor chips don't require a firmware upload; the protocol they run is vastly simpler than wifi -- it's like UART-over-2.4ghz-GFSK-radio plus some error correction.
https://www.sparkfun.com/datasheets/Components/nRF24L01_prel...
The block diagram doesn't show any kind of CPU in there.