main/linux-postmarketos-grate: upgrade to 5.11_rc5 (MR 1883)

This updates the current commit and refactor APKBUILD to
more modern way of writing downstream kernels. Also move to main/ to fit
other linux-postmarketos-* kernels.

device/testing/linux-postmarketos-grate/APKBUILD → main/linux-postmarketos-grate/APKBUILD

-_flavor=postmarketos-grate
-_commit="beb89d003392a1bccf719beda4a6eb8f9a4864b2"
-_config="config-$_flavor.armv7"
-
 pkgname=linux-postmarketos-grate
-pkgver=5.10.0_rc1
-pkgrel=1
+pkgver=5.11.0_rc5
+pkgrel=0
 arch="armv7"
 pkgdesc="Linux kernel with experimental patches for Tegra"
 url="https://postmarketos.org"
 makedepends="perl sed installkernel bash gmp-dev bc linux-headers elfutils-dev
 	     devicepkg-dev bison flex openssl-dev xz findutils"
 options="!strip !check !tracedeps pmb:cross-native"
-source="
-	$pkgname-$pkgver-$_commit.tar.gz::https://github.com/grate-driver/linux/archive/$_commit.tar.gz
-	$_config
-"
 license="GPL-2.0-only"
 
+# Source
+_flavor=postmarketos-grate
+_commit="7fb777bbf4668de2766055665764461b269ebf99"
 _carch="arm"
-
-_ksrcdir="$srcdir/linux-$_commit"
+_config="config-$_flavor.$arch"
+source="$pkgname-$pkgver-$_commit.tar.gz::https://github.com/grate-driver/linux/archive/$_commit.tar.gz
+	$_config"
+builddir="$srcdir/linux-$_commit"
 
 prepare() {
 	default_prepare
-	mkdir -p "$srcdir"/build
-	cp -v "$srcdir"/$_config "$srcdir"/build/.config
-	make -C "$_ksrcdir" O="$srcdir"/build ARCH="$_carch" \
-		olddefconfig
+	REPLACE_GCCH=0 \
+		. downstreamkernel_prepare
 }
 
 build() {
-	cd "$srcdir"/build
 	unset LDFLAGS
 	make ARCH="$_carch" CC="${CC:-gcc}" \
-		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-Alpine"
+		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-$_flavor"
 }
 
 package() {
-	install -Dm644 "$srcdir/build/arch/$_carch/boot/"*zImage \
-		"$pkgdir/boot/vmlinuz-$_flavor"
+	downstreamkernel_package "$builddir" "$pkgdir" "$_carch" "$_flavor"
 
-	install -D "$srcdir/build/include/config/kernel.release" \
-		"$pkgdir/usr/share/kernel/$_flavor/kernel.release"
-
-	cd "$srcdir"/build
-
-	local _install
-	case "$CARCH" in
-	aarch64*|arm*)	_install="modules_install dtbs_install" ;;
-	*)		_install="modules_install" ;;
-	esac
-
-	make -j1 $_install \
+	make -j1 modules_install dtbs_install \
 		ARCH="$_carch" \
 		INSTALL_MOD_STRIP=1 \
 		INSTALL_MOD_PATH="$pkgdir" \
 		INSTALL_DTBS_PATH="$pkgdir/usr/share/dtb"
 }
-sha512sums="ce80aaffc5cbab755ba50804bdf43c4b8c814bedcb4729e2ccfc2cfa3252a0110e397794850337d38047423d9f466bf170e6d0bfa0bc9d93c0ee5556b38e1785  linux-postmarketos-grate-5.10.0_rc1-beb89d003392a1bccf719beda4a6eb8f9a4864b2.tar.gz
-2a30b072391c21e8adf9e832cff5589d80fa27c0aa387fc568385c1ad3798e5741b20ee85e4b8b588dd5183e4efee15d35bff971a2e55b2ef85106a8f38be074  config-postmarketos-grate.armv7"
+
+sha512sums="9b3828ba7d834fd0a7da37eef1d425c1133afaebe73d2bbed2f8ec6e3695b834dbe9e19d33f0f4d954be7ff1e8f4f9151067525e6aab4d7c8f5e50fa071e2b49  linux-postmarketos-grate-5.11.0_rc5-7fb777bbf4668de2766055665764461b269ebf99.tar.gz
+8520783678f2b1559f0157864cc7dac609744d8363f045cf92ec3d2248deac54f9f1c2a7d9581398bac659dfddb758a1c7f41c699742cdc2b8151f246f798714  config-postmarketos-grate.armv7"