redhat: change compression flags for xz

JIRA: https://issues.redhat.com/browse/RHEL-79278
Upstream Status: git@gitlab.com:cki-project/kernel-ark.git

commit b1b87d55b54179a7ead27bc3b1b3047f55a56ab7
Author: Herton R. Krzesinski <herton@redhat.com>
Date:   Tue Feb 18 10:51:18 2025 -0300

    redhat: change compression flags for xz

    The macro compression_flags is used in the compression of kernel modules.
    The default xz integrity check used is crc64. In the next change, we
    will switch to in-kernel decompression of modules. The problem is that
    it doesn't have support for the crc64 check, so we must manually switch
    to crc32. While at it, also add --lzma2=dict=1MiB which is also used by
    the kernel at scripts/Makefile.modinst and in general follows
    recommendation/dictionary sizes explained in the kernel documentation
    at Documentation/staging/xz.rst.

Signed-off-by: Herton R. Krzesinski <herton@redhat.com>

Author: Herton R. Krzesinski

redhat/kernel.spec.template

@@ -120,7 +120,7 @@ Summary: The Linux kernel
 
 # Default compression algorithm
 %global compression xz
-%global compression_flags --compress
+%global compression_flags --compress --check=crc32 --lzma2=dict=1MiB
 %global compext xz
 
 %if 0%{?fedora}