linux-postmarketos-qcom-sm8250: enable zstd firmware compression support (MR 5450)

See https://gitlab.com/postmarketOS/pmaports/-/merge_requests/5380

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

device/testing/linux-postmarketos-qcom-sm8250/APKBUILD

@@ -5,7 +5,7 @@
 _flavor="postmarketos-qcom-sm8250"
 pkgname=linux-$_flavor
 pkgver=6.10.0
-pkgrel=1
+pkgrel=2
 pkgdesc="Mainline kernel fork for SM8250"
 arch="aarch64"
 _carch="arm64"
@@ -64,5 +64,5 @@ package() {
 
 sha512sums="
 2fdaa13c25c573a1b41dec1c6ad71bdbb4bb18f81c41aea1d114e631215371d7970e5a6a407d977366cacfcfe66229788668942c774fddb56037a493e87b2402  linux-postmarketos-qcom-sm8250-sm8250-6.10.0.tar.gz
-7ac069d4d8dda94eb547a50564838632dc40f663fbd9abcd8d367ab8344e3dde8e62f6339a63c96a8654b474d83f4726cd61d78d81655581439ce0a84ce05ee4  config-postmarketos-qcom-sm8250.aarch64
+b97d1065adc9dca21d90c809a84be93f5cc8fdaa9979b312f8143ea3041d15fbc87987de6880e5c7f1438e62d8657daebbb818bc360d7aa1254bb3e3dac35cc8  config-postmarketos-qcom-sm8250.aarch64
 "

device/testing/linux-postmarketos-qcom-sm8250/config-postmarketos-qcom-sm8250.aarch64

@@ -1813,7 +1813,7 @@ CONFIG_FW_LOADER_USER_HELPER=y
 # CONFIG_FW_LOADER_USER_HELPER_FALLBACK is not set
 CONFIG_FW_LOADER_COMPRESS=y
 CONFIG_FW_LOADER_COMPRESS_XZ=y
-# CONFIG_FW_LOADER_COMPRESS_ZSTD is not set
+CONFIG_FW_LOADER_COMPRESS_ZSTD=y
 CONFIG_FW_CACHE=y
 # CONFIG_FW_UPLOAD is not set
 # end of Firmware loader