linux-postmarketos-qcom-sdm845: upgrade to 6.9-rc4 (MR 5036)

Signed-off-by: Caleb Connolly <caleb@postmarketos.org>

[ci:skip-build]: already built successfully in CI

device/community/linux-postmarketos-qcom-sdm845/APKBUILD

@@ -5,8 +5,8 @@
 
 _flavor="postmarketos-qcom-sdm845"
 pkgname=linux-$_flavor
-pkgver=6.6.3
-pkgrel=4
+pkgver=6.9_rc4
+pkgrel=0
 pkgdesc="Mainline Kernel fork for SDM845 devices"
 arch="aarch64"
 _carch="arm64"
@@ -18,7 +18,7 @@ options="!check !tracedeps
 makedepends="bash bison findutils flex installkernel openssl-dev perl zstd"
 
 _config="config-$_flavor.$arch"
-_tag="sdm845-6.6.3-r3"
+_tag="sdm845-6.9-rc4"
 
 # Source
 source="
@@ -73,8 +73,8 @@ package() {
 }
 
 sha512sums="
-621ee00668c8739503042074615e95949e55124f48c488de83bcce733fa4b140576f26ab37d47a886136f8167832751036905a18dbb7455649b146bb3dfb22cf  linux-sdm845-6.6.3-r3.tar.gz
-9393e50336d1b8767c67ffd347000d0191a3fa8645d77b0f8ec222cad837f8f3b2201e6bd1360d62218f5246eaea93f7bf76a7b2a4e0954360fd30291f5bb3a6  config-postmarketos-qcom-sdm845.aarch64
+83225cedc55ba80d6170ea2ccc24ddf210be83388c926cf8376beed4431109c7682c31ed55548e7dbe416b8dc3267c144c288b297a73725096e3e3b70d988f8c  linux-sdm845-6.9-rc4.tar.gz
+89e3db1296135d75db567b9b76a1434d8e22bb172bfcdc2fc713807c245a1e1ba55321cbf1334f1ad6391fa892af8e92eca9947f5d7d162124e2413b80a88195  config-postmarketos-qcom-sdm845.aarch64
 e0ae8b9da09cd2552244cfbcd6a63272c766d082306573a679497ab0bd30a44dfa0023503a7628b7ea87238a62da13704de5e2a57952310c7866b770e5c474ad  0001-arm64-dts-qcom-sdm845-xiaomi-polaris-Enable-ath10k-h.patch
 d7c857500348a1420ccd1a255c667704e54ee88f5c563bcb92885aaa5a9b5dc5a87d12ab782822de523d01c63b277ff60b57cc5307a0663bf42ad7b69da3d1c5  0002-drm-panel-Enable-prepare_prev_first-flag-for-NT35596.patch
 "