main/postmarketos-mkinitfs: fix showing custom splash after running osk-sdl (MR 2647)

Support for custom "Loading..." splashes was added in MR 1776, but
`unlock_root_partition` function is still hardcoding default "Loading..."
splash. Fix this behaviour by replacing usage of `show_splash` function with
`show_splash_loading`, which accounts for presence of custom splash.

Closes #759

main/postmarketos-mkinitfs/APKBUILD

@@ -2,7 +2,7 @@
 # Co-Maintainer: Clayton Craft <clayton@craftyguy.net>
 pkgname=postmarketos-mkinitfs
 pkgver=1.1.2
-pkgrel=0
+pkgrel=1
 pkgdesc="Tool to generate initramfs images for postmarketOS"
 url="https://postmarketos.org"
 depends="
@@ -69,5 +69,5 @@ sha512sums="
 67341444c21fc884751ee12fec4069132184d6346fe6dee3f90989ed1417322336c3f135a5099dce5cecce64ad1f2a5e7ce254e5fdc772e20a150facb09f3763  postmarketos-mkinitfs-1.1.2.tar.gz
 950ac042f19055979cb53b39be93866c88aba0acd5a49cd768522505991e2bd2851735677e777caa6c8973e006318582ddd975214eccc5c35c2c1d649af6d71e  00-default.modules
 40033b421e79999c85bd72e1353fe6745a87fcbf9f6a5b8180e832c7f340da7d4e33d056f557ae95a9924f5d186a6e728f3ed53c0922cdac4c39513fdc3e3a82  init.sh
-2a8c4d11df8dfbda0b3c87cbb4a186c3686730ed28beb5f7c5b7527080bf4470e678404573d66a3ccbdbc969b3179be54b4535cfd16b6161c8ca214fe53142ee  init_functions.sh
+8c411d808a0830344d447f2c8afdcd98b40b493ae982638e66e7e095a9d3fd1024d4034762631d9f7c0667d1553e5a40f9847b8cbb48c2a09e6a6d49c3ad6d7d  init_functions.sh
 "

main/postmarketos-mkinitfs/init_functions.sh

@@ -301,7 +301,7 @@ unlock_root_partition() {
 		done
 		ROOT_PARTITION_UNLOCKED=1
 		# Show again the loading splashscreen
-		show_splash /splash-loading.ppm.gz
+		show_splash_loading
 	fi
 }