[fpga-ps-mio] move UART_TXD/UART_RXD from MIO30/31 to MIO54/55
move UART_TXD/UART_RXD from MIO30/31 to MIO54/55 (see corresponding note for fpga-bank-87-88.SchDoc).
move UART_TXD/UART_RXD from MIO30/31 to MIO54/55 (see corresponding note for fpga-bank-87-88.SchDoc).