xiaomi-laurel: new device (Xiaomi Mi A3)

A quirky device, the last Mi Ax phone in the line. - Powered by
Snapdragon 665 (SM6125, codenamed Trinket), 8 cores, 4 clocked a 2.0
GHz and 4 more clocked at 1.8 GHz. 4-6 GB of RAM, 64-128 GB of UFS
storage, 720p 6.09" AMOLED display, a 48 Mpx quad-bayer camera (plus two
more on the back and one on the front) and an under display fingerprint
sensor which may be impossible to ever implement... *sigh*

Mainline kernel as of now is pretty minimal (framebuffer display, USB
networking). No UFS support (yet!).

device/testing/device-xiaomi-laurel/APKBUILD

+# Reference: <https://postmarketos.org/devicepkg>
+pkgname=device-xiaomi-laurel
+pkgdesc="Xiaomi Mi A3"
+pkgver=0.1
+pkgrel=0
+url="https://postmarketos.org"
+license="MIT"
+arch="aarch64"
+options="!check !archcheck"
+depends="
+	linux-postmarketos-qcom-sm6125
+	mesa-dri-gallium
+	mkbootimg
+	postmarketos-base
+"
+makedepends="devicepkg-dev"
+source="deviceinfo"
+
+build() {
+	devicepkg_build $startdir $pkgname
+}
+
+package() {
+	devicepkg_package $startdir $pkgname
+}
+
+sha512sums="
+ed867de931bd75b00c87a4bc89a5d0a9a266e18cc5c4c26eccae88ddff7c106c987420f7b6522e5ff9484b9c716fdf4000003a5074d0baef3084a75272165355  deviceinfo
+"

device/testing/device-xiaomi-laurel/deviceinfo

+# Reference: <https://postmarketos.org/deviceinfo>
+# Please use double quotes only. You can source this file in shell
+# scripts.
+
+deviceinfo_format_version="0"
+deviceinfo_name="Xiaomi Mi A3"
+deviceinfo_manufacturer="Xiaomi"
+deviceinfo_codename="xiaomi-laurel"
+deviceinfo_year="2019"
+deviceinfo_dtb="qcom/sm6125-xiaomi-laurel_sprout"
+deviceinfo_arch="aarch64"
+
+# Device related
+deviceinfo_chassis="handset"
+deviceinfo_keyboard="false"
+deviceinfo_external_storage="true"
+deviceinfo_screen_width="720"
+deviceinfo_screen_height="1560"
+
+# Bootloader related
+deviceinfo_flash_method="fastboot"
+deviceinfo_kernel_cmdline="clk_ignore_unused"
+deviceinfo_generate_bootimg="true"
+deviceinfo_flash_fastboot_partition_vbmeta="vbmeta"
+deviceinfo_bootimg_qcdt="false"
+deviceinfo_bootimg_mtk_mkimage="false"
+deviceinfo_bootimg_dtb_second="false"
+deviceinfo_append_dtb="true"
+deviceinfo_flash_pagesize="4096"
+deviceinfo_flash_offset_base="0x00000000"
+deviceinfo_flash_offset_kernel="0x00008000"
+deviceinfo_flash_offset_ramdisk="0x01000000"
+deviceinfo_flash_offset_second="0x00f00000"
+deviceinfo_flash_offset_tags="0x00000100"