tools/testing/cxl: Fix cxlhdmdecode_init() calling convention
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.19.4 by commit f1347e13865af216e91f574ac2388c27f3312554, it was introduced in version v5.19 by commit 92804edb11f065aadb3a4f398bed8a846a035cd3. For more details please see the references link.