In short: it's difficult.
First of all because Qualcomm bought Atheros that bought Attansic. And with each additional link in the chain it seemed like they cared less and less about Ethernet (so much that latest hardware is better off downgraded).
Second, there's an incredible amount of confusion between the transceivers (AR80xx) and actual complete network controllers (AR81xx).
Now, the close temporal proximity of 8021 and 8121 presentations makes me suppose the former is inside the latter. And according to documents the first is definitely Gigabit (so I would suppose the NIC)
But then, for as much the driver and PID might be the same, let's remember we are still talking about 3 separate chips. And AR8113 datasheet confirms that's just 10/100.
As for AR8114.. I could only find sparse and discordant info.
So, it all depends.