asus-me176c: use fastboot-bootpart flasher (!930)

Flash (split) boot partition to the "APD" partition.
It's a rather useless partition with media files for demo purposes.
Perfect for a small(-ish) boot partition with ~300 MB.

device/device-asus-me176c/APKBUILD

@@ -4,7 +4,7 @@
 pkgname="device-asus-me176c"
 pkgdesc="ASUS MeMO Pad 7 (ME176C(X))"
 pkgver=1
-pkgrel=4
+pkgrel=5
 url="https://postmarketos.org"
 license="MIT"
 arch="x86_64"
@@ -52,5 +52,5 @@ nonfree_firmware() {
 	mkdir "$subpkgdir"
 }
 
-sha512sums="3a329f76237c5fcacc194892a32855d6b4b724f8320d0a43594ceafdba8a447706b590b290bc927256365bc65eeeb300579ee000e99ba7c9acb19cbb12ead56f  deviceinfo
+sha512sums="8fb5d58113a9180ecf6d52087e2f71820d3a2f968aa43eb18b80fd999e66e5f4c224bd7048654bd3a51e6b6ed4e6baca3325dcdde14de0e0c5720326603d8d98  deviceinfo
 75243e3d0bc9a352465683ec8cf8b83566e4131bb7fae0f388267a62bdbf4691c955ed034b30df550f921b771080688123ae8db144b72f786bf1677ef1d83f57  3155254999ac36c3051a2118c415de25a072c0f6.tar.gz"

device/device-asus-me176c/deviceinfo

@@ -20,5 +20,9 @@ deviceinfo_dev_touchscreen_calibration=""
 deviceinfo_dev_keyboard=""
 
 # Bootloader related
-deviceinfo_flash_method="none"
+deviceinfo_flash_method="fastboot-bootpart"
+
+# "ASUS Product Demo", contains mostly useless audio/video files for demo purposes...
+# With ~300 MB it is perfect as (second) EFI boot partition.
+deviceinfo_flash_fastboot_partition_kernel="APD"
 deviceinfo_boot_filesystem="fat32"