To define odd parity for Universal Asynchronous Receiver Transmitter (UART) in a design, set/enable the EPS (Even Parity Select Bit) that is bit 4 of Line Control Register (LCR), so that the Odd Parity is selected.
Please note that Parity Even is an active low signal in intface.vhd/RTL Code @ line #489.
So, if you set bit 4 of LCR to 1, then it will be treated as Odd Parity.