Usb common

[fysnet]

This catches (possible) errors in the Bochrc file when declaring USB port options.
The first catches when the user defines a port twice. This will PANIC.

usb_ohci: port1=mouse, options1="speed:low, model:m228"
usb_ohci: port1=keyboard, options1="speed:low"

The second catches a possible error if the user copy/pastes a line and forgets to update the options# part as in the example below.

usb_ohci: port1=tablet, options1="speed:low"
usb_ohci: port2=disk, options1="speed:full, path:hdd.img"

However, this will not PANIC since the following is completely legal:

usb_ohci: port2=disk
usb_ohci: options2="speed:full"
usb_ohci: options2="path:hdd.img"

This will simply display an error on the Bochs console window.