dkms: use saner compression defaults

Currently our compression options vary from those used in upstream
kernel. As of 6.8-rc2 upstream uses (ignoring force/rm input file etc):

 - gzip -9
 - xz --check=crc32 --lzma2=dict=1MiB
   Note: some older kernels lacked crc32 and/or used 2MiB
 - zstd -T0 (aka -3)

With the higher dictionary size (xz) and compression size (20+ zstd)
more memory is required for decompression. Which may be a problem if the
kernel itself is responsible for the decompression (instead of kmod),
since it uses a smaller/limited ram amount.

Reduce the numbers of be compatible with upstream.

Closes: dell#386

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>

dkms.in

@@ -1154,9 +1154,9 @@ actual_build()
         if [ "$module_compressed_suffix" = ".gz" ]; then
             gzip -9f "$built_module" || compressed_module=""
         elif [ "$module_compressed_suffix" = ".xz" ]; then
-            xz -f "$built_module" || compressed_module=""
+            xz --check=crc32 --lzma2=dict=1MiB -f "$built_module" || compressed_module=""
         elif [ "$module_compressed_suffix" = ".zst" ]; then
-            zstd -q -f -T0 -20 --ultra "$built_module" || compressed_module=""
+            zstd -q -f -T0 -19 "$built_module" || compressed_module=""
         fi
         if [ -n "$compressed_module" ]; then
             cp -f "$compressed_module" "$base_dir/module/${dest_module_name[$count]}$module_suffix" >/dev/null