fairphone-fp4: fix osk-sdl touch and flash kernel on upgrade (MR 3321)

The touchscreen currently is on i2c-gpio due to issues with the hardware
i2c. Include the module in initfs so the touch driver probes and is
usable in osk-sdl.

[ci:skip-build]: already built successfully in CI

device/testing/device-fairphone-fp4/APKBUILD

 # Reference: <https://postmarketos.org/devicepkg>
 pkgname=device-fairphone-fp4
 pkgdesc="Fairphone 4"
-pkgver=0.5
+pkgver=0.6
 pkgrel=0
 url="https://postmarketos.org"
 license="MIT"
@@ -13,6 +13,7 @@ depends="
 	mesa-vulkan-freedreno
 	mkbootimg
 	postmarketos-base
+	postmarketos-update-kernel
 "
 makedepends="devicepkg-dev"
 source="
@@ -66,7 +67,7 @@ phosh() {
 
 sha512sums="
 2974ccc172bf1299daeb0bc746879b3a1db1fbc3a2b163a02a6554fed6ed9f733144bcf976cd2441c5664d496dcce3ae943f4314c653470dc07dda0de5ad632b  90-feedbackd-aw8695.rules
-d84e25eda52b40a0ca3bcfed79d4f73bfc7b28889d1882a5b78dffe069fdeb54390f0dea800e4ae4aae2011322b410551c204caf4a39fdf42d5faf3869f95556  deviceinfo
+1f27d0fdab73e820eb0785f3127802b9d63b952caa643998fe5de4aec873d3eb405023ac0671d0a10518c35f3bd63d9b1bbfbac158fe0896fb9b67e54d594e60  deviceinfo
 25a93dcbe6dbc6cff24f57cbf5539bc475c5fe0f6bf5e8374c7032b9c38a939bef0aa0cde1707afcc16b1ec2d0859c03c6ee92d80d8048d1c6adc6e25178b85f  gtk.css
 65f74d29ab318b23f7ac8923a3661f2c4130049273a8c6be234ed2c8e00810b6a1254b54cf0932e42850a6d48f821dcd038900fbb836feeddfab2759afffae38  phoc.ini
 "

device/testing/device-fairphone-fp4/deviceinfo

@@ -9,8 +9,9 @@ deviceinfo_codename="fairphone-fp4"
 deviceinfo_year="2021"
 deviceinfo_dtb="qcom/sm7225-fairphone-fp4"
 deviceinfo_append_dtb="true"
-deviceinfo_modules_initfs="msm panel-hx83112a-auo"
+deviceinfo_modules_initfs="i2c-gpio msm panel-hx83112a-auo"
 deviceinfo_arch="aarch64"
+deviceinfo_flash_kernel_on_update="true"
 
 # Device related
 deviceinfo_gpu_accelerated="true"