The scaler may return invalid version or public-key.
This checks for the public-key by verifing if it starts with "N = " for
both devices usbhub and scaler; however, the scaler version cannot be
checked.
Note: Replug the USB-C cable is fixes the issue.
The Special Protect Sector structure is 24-bit long.
This replaces the 32-bit integer in union that makes the structure
8-bits too big by an array of 3-bytes.
