fix swapped vid and pid, fix input_devices instead of input_device

[sanjay900]

While trying to implement PS3 instrument support, i noted that vid and pid were swapped, which was causing my code to never get called

I was also trying to work out why hotplugging devices didn't seem to be working, and while i could not figure that one out, i did note that there was an input_devices instead of a input_device.

[xerpi]

Thanks for the fixes!