HID: hid-kye: Fix incorrect function name for kye_tablet_enable()

Fixes the following W=1 kernel build warning(s):

 drivers/hid/hid-kye.c:666: warning: expecting prototype for Enable fully(). Prototype was for kye_tablet_enable() instead

Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: linux-input@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>