device-lenovo-kuntao: add gpu firmware and panel

this actually depends on https://github.com/msm8953-mainline/linux/pull/215

device/testing/device-lenovo-kuntao/APKBUILD

 # Reference: <https://postmarketos.org/devicepkg>
 pkgname=device-lenovo-kuntao
 pkgdesc="Lenovo P2"
-pkgver=2
-pkgrel=2
+pkgver=3
+pkgrel=0
 url="https://postmarketos.org"
 license="MIT"
 arch="aarch64"