HID: logitech-hidpp: create a capabilities bits field

Do not pollute the quirks bits field which is public API
with elements that are queried from the device.

Move the 2 battery capabilities into the new field.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Tested-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>