Partially revert "linux-*: install dtbs to /boot/dtbs (MR 3254)

Reverts commit 70efe55031 for kernels that
started failing on bpo. I suspect it's caused by a change in binutils,
since I tried building linux-oneplus-billie2 with gcc6 and got the same
error (after trying other workarounds like disabling selinux for it, but
then it failed elsewhere).

device/testing/linux-oneplus-billie2/APKBUILD

@@ -1,9 +1,13 @@
 # Reference: <https://postmarketos.org/vendorkernel>
 # Kernel config based on: arch/arm64/configs/vendor/bengal_defconfig
 
+# FIXME: this kernel doesn't build anymore!
+# Once this is fixed, re-apply MR 3254: put dtbs in /boot.
+# https://builds.sr.ht/~postmarketos/job/858910
+
 pkgname=linux-oneplus-billie2
 pkgver=4.19.95
-pkgrel=2
+pkgrel=1
 pkgdesc="OnePlus Nord N100 kernel fork"
 arch="aarch64"
 _carch="arm64"
@@ -49,8 +53,9 @@ package() {
 	KERNEL_IMAGE_NAME=Image.gz downstreamkernel_package \
 		"$builddir" "$pkgdir" "$_carch" "$_flavor" "$_outdir"
 
+	mkdir -p "$pkgdir/usr/share/dtb"
 	install -Dm644 "$_outdir/arch/arm64/boot/dts/vendor/20882/bengal-qrd.dtb" \
-		"$pkgdir/boot/dtbs"
+		"$pkgdir/usr/share/dtb"
 
 	make O="$_outdir" \
 		ARCH="$_carch" \

device/testing/linux-teclast-x80pro/APKBUILD

@@ -7,12 +7,16 @@ _config="config-$_flavor.$CARCH"
 
 pkgname=linux-$_flavor
 
+# FIXME: this kernel doesn't build anymore!
+# Once this is fixed, re-apply MR 3254: put dtbs in /boot.
+# https://builds.sr.ht/~postmarketos/job/858721
+
 pkgver=4.14.73
 case $pkgver in
 	*.*.*)	_kernver=${pkgver%.*};;
 	*.*) _kernver=$pkgver;;
 esac
-pkgrel=7
+pkgrel=6
 
 arch="x86_64"
 pkgdesc="Linux for pmOS supported chipsets (stable)"
@@ -119,7 +123,7 @@ package() {
 	make -j1 $_install \
 		ARCH="$_carch" \
 		INSTALL_MOD_PATH="$pkgdir" \
-		INSTALL_DTBS_PATH="$pkgdir/boot/dtbs"
+		INSTALL_DTBS_PATH="$pkgdir/usr/share/dtb"
 }