Thanks for your response. That was really helpful.
I was able to use the PMOD AD1 library and both channels worked. Although, I noticed a weird issue. In normal scenario, if I have a pot connected as input to a standard QSPI and vary the pot, the ADC output is 0 to 4096. Although the PMOD library IP varies from 0 to 4096 to 0 to 4096. I don't get why at 3.3V/2 the input with the PMOD goes back to 0. I feel it's something very small but I'm not sure what's causing this to happen.
On the other hand, I was not able to change the transaction width of the QSPI beyond 8 bit