GPIO Expander port

[VojislavM]

Koruza computer module board GPIO expander header will be on the left edge of the board. It will be used in the future to connect Koruza router board.

It has:

• USB port, which is also connected to the USB and Ethernet HUB, and if this port wants to be used zero ohm resistors need to be soldered.
• UART
• I2C, which is shared with the SFP module
• GPIO pins
• Power pins, 5V and 3.3V, these are output power pins!

[VojislavM]

change RGB LED pin so the UART is on the expander connector