Test v1.0.0 PS/2 ports

[thejpster]

[thejpster]

Keyboard port works. Need to test mouse port.

[thejpster]

v1.1 keyboard port also works, although we're seeing issues with some models of keyboard. Suspect it's a speed issue with the BMC interrupt, or there's a chance the pull-ups aren't strong enough. Need to check with a scope.

[thejpster]

mouse port tested - see Neotron-Compute/Neotron-BMC#70