WIP: usbhid: Use hid_leds_handler

This patch modifies usb_hidinput_input_event so it uses the generic
LEDs input events handler helper provided by hid core instead of
using its own handler.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
HID: hidp: Use hid_leds_handler

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>