Add support for MOXA Mini PCIe serial boards:
- CP102N: 2 ports | RS232
- CP104N: 4 ports | RS232
- CP112N: 2 ports | RS232/RS422/RS485
- CP114N: 4 ports | RS232/RS422/RS485
- CP132N: 2 ports | RS422/RS485
- CP134N: 4 ports | RS422/RS485
Signed-off-by: Crescent CY Hsieh <crescentcy.hsieh@xxxxxxxx>