dinput: Add evdev mouse driver.

[Stefan Dösinger]

Hi,
> This is the first fully working implementation of dinput mouse using evdev
> generic input driver. I have enabled this driver by default. If people do
> not have functioning HAL or that for some reasons it can't find the mouse
> device, it will fall-back to current mouse driver.
>
> Use explorer to enumerate all mice devices. Unfortunately msdn says there
> can only be one system pointer device.
I was curious if that patch fixes Empire Earth, so I tried it, but it fails to 
create a new evdev mouse and falls back to the x11 based mouse. It seems that 
HKEY_LOCAL_MACHINE\HARDWARE\DeviceMap\PointerClass does not exist. I've run 
wineprefixcreate and made sure I have full access to /dev/input/*, do I need 
anything else?