[sony-laptop] Hardware keys are not properly mapped on Sony VAIO UX VGN-UX390N

["Michał Szczepaniak" <m.szczepaniak.000@gmail.com>]

Hello,

I have Sony VAIO VGN-UX390N and it has 3 miscellaneous buttons on the 
front. Zoom in/out and third that I'm not sure what it does. Both third 
and zoom out register as XF86Launch1 and zoom in is not being 
registered. After some looking into it, using evtest /dev/input/event5 
I've established that zoom in reports as "KEY_ZOOMIN" but because the 
keycode is above 255 it doesn't register, but from documentation I've 
established that I can remap it to XF86ZoomIn via udev.

That's all fine but both zoom out and the third button register as 
KEY_PROG1 and fixing that is not as simple as remapping so here I am 
asking for help with debugging that. I'll be fast to respond and provide 
everything that's needed.

Thanks!