linux-lenovo-21bx: use zinstall (MR 4739)

device/testing/linux-lenovo-21bx/APKBUILD

@@ -2,7 +2,7 @@
 # Co-Maintainer: Clayton Craft <clayton@craftyguy.net>
 pkgname=linux-lenovo-21bx
 pkgver=6.7
-pkgrel=1
+pkgrel=2
 _commit="dd209a8fb4840e48ca4963bb23057f38b1066a6d"
 pkgdesc="Lenovo ThinkPad X13s kernel fork"
 arch="aarch64"
@@ -24,6 +24,7 @@ makedepends="
 	flex
 	openssl-dev
 	perl
+	postmarketos-installkernel
 "
 
 # Source
@@ -49,12 +50,10 @@ build() {
 }
 
 package() {
-	install -Dm644 "$builddir/arch/$_carch/boot/vmlinuz.efi" \
-		"$pkgdir/boot/vmlinuz"
-
-	make modules_install dtbs_install \
+	mkdir -p "$pkgdir"/boot
+	make zinstall modules_install dtbs_install \
 		ARCH="$_carch" \
-		INSTALL_PATH="$pkgdir"/boot/ \
+		INSTALL_PATH="$pkgdir"/boot \
 		INSTALL_MOD_PATH="$pkgdir" \
 		INSTALL_MOD_STRIP=1 \
 		INSTALL_DTBS_PATH="$pkgdir"/boot/dtbs