device-xiaomi-clover: generate extlinux config (MR 5914)

So it can be booted using U-Boot bootstd method.

Signed-off-by: Alexey Min <alexey.min@gmail.com>

device/testing/device-xiaomi-clover/APKBUILD

 # Reference: <https://postmarketos.org/devicepkg>
 pkgname=device-xiaomi-clover
 pkgdesc="Xiaomi Mi Pad 4"
-pkgver=3
+pkgver=4
 pkgrel=0
 url="https://postmarketos.org"
 license="MIT"
@@ -48,7 +48,7 @@ kernel_cloverplus() {
 }
 
 sha512sums="
-3f47b5e767a819ada5d45818249c9b1470a29e81be62f955cf02a38b0fc0359a02c6655bf7911230fdeff5abc8e00260a4feb5afcb1b30d96954764ef8724a00  deviceinfo
+4c4573c138b2fe1db8bd7fceafeccb9a4a9c1692188a61b1a00617406324becf500dd009e25db96ec18d7fb183fd38d2e1b13145a89f0ead2ec9d86f2edb3893  deviceinfo
 b6dbe06e0cd692ecc95d4cccd908ae675f5fe91dbe137508c85f0e24b2c5fa109b58c55a9e27b82eec2221891a139eae8f29887e8b5d77953543e155e8182f23  modules-initfs.clover
 2239eced1a2ece9c9a4094c5b8a0c1ab410356eeeb0083b6be3f32e9d375784402350d648f56c27503eb19ba4f2598ea215e1903b07a0a963b22870056fbec34  modules-initfs.cloverplus
 "

device/testing/device-xiaomi-clover/deviceinfo

@@ -10,7 +10,6 @@ deviceinfo_dtb_clover="qcom/sdm660-xiaomi-clover"
 deviceinfo_dtb_cloverplus="qcom/sdm660-xiaomi-clover-plus"
 deviceinfo_append_dtb="true"
 deviceinfo_arch="aarch64"
-deviceinfo_flash_kernel_on_update="true"
 
 # Device related
 deviceinfo_chassis="tablet"
@@ -21,10 +20,12 @@ deviceinfo_screen_height="1920"
 deviceinfo_gpu_accelerated="true"
 
 # Bootloader related
+deviceinfo_flash_kernel_on_update="true"
 deviceinfo_flash_method="fastboot"
 deviceinfo_flash_fastboot_partition_vbmeta="vbmeta"
 deviceinfo_kernel_cmdline="ignore_loglevel"
 deviceinfo_generate_bootimg="true"
+deviceinfo_generate_extlinux_config="true"
 deviceinfo_bootimg_qcdt="false"
 deviceinfo_bootimg_mtk_mkimage="false"
 deviceinfo_bootimg_dtb_second="false"