UIO-4031 RS232：U-COM4/5

UIO-4031 RS232：U-COM4/5
Device Node
/dev/ttyS8
/dev/ttyS7

Loopback Test

U-COM4

# /tools/test/adv/uart/rs232_2_wire_test.sh /dev/ttyS8

U-COM5

# /tools/test/adv/uart/rs232_2_wire_test.sh /dev/ttyS7