LU-17031 build: fix refefine __compiletime_strlen error

LU-17031 build: fix refefine __compiletime_strlen error

Lustre build failed on Ubuntu 2204 kernel v5.17 with "redefine
__compiletime_strlen".
This patch fixes this build error.

Fixes: 919b93b951 ("LU-16510 build: fortified memcpy from linux 6.1")
Signed-off-by: Qian Yingjin <qian@ddn.com>
Change-Id: Ic26daecd6b91614e01b5b0030f40eede205a21f7
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/51953
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>