Input: evdev - fix EVIOCG{type} ioctl

Input: evdev - fix EVIOCG{type} ioctl

The 'max' size passed into the function is measured in number of bits
(KEY_MAX, LED_MAX, etc) so we need to convert it accordingly before trying
to copy the data out, otherwise we will try copying too much and end up
with up with a page fault.

Reported-by: Pavel Machek <[email protected]>
Reviewed-by: Pavel Machek <[email protected]>
Reviewed-by: David Herrmann <[email protected]>
Signed-off-by: Dmitry Torokhov <[email protected]>