HID: uHID: remove duplicated code

uhid_hid_output_report() can be implemented through a simple call
to uhid_hid_output_raw().

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>