kcms/mouse also filter mice that say they're keyboards
When enumerating devices to identify mice, the KCM already filters out pointer devices that say they're touchpads. But it doesn't do so for devices that say they're keyboards.
This is weird, but apparently a lot of gaming mice report themselves as multiple devices with one being a keyboard that has only a couple of buttons on it.
let's filter these out so that we only see the mouse representation of these devices in the KCM
BUG: 465957 FIXED-IN: 6.1