riscv: stacktrace: Fix missing the first frame
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 v5.15.94 by commit 1a52ef89e3695191d9518647906f69bd6a5b76ff, it was introduced in version v5.15.24 by commit 71f46f3d1bf29ee5b0a53dc21462125f754491dd. For more details please see the references link.