[ALPS08839044] Touch: add compatible string

[Description]
Restore compatible string for GT9916, which was deleted before.

[Test]
touch work

MTK-Commit-Id: cebc78d6f5e0fda2745ac286789f18da78d0620f

Signed-off-by: mtk27743 <jianming.liu@mediatek.com>
CR-Id: ALPS08839044
Feature: touch_driver
Change-Id: I2960e5857d6b194eb7022d254a804eaacd1fd64a