HID: logitech-hidpp: add support to disable tap-to-click on the K400
The Logitech K400 keyboard has an embedded touchpad which is seen as a
mouse from the OS point of view. There is a hardware shortcut to disable
tap-to-click but the setting is not remembered accross reset, annoying
some users.
We can toggle this feature from the host by using the feature 0x6010:
Touchpad FW items