RISC-V: Add fast call path of crash_kexec()
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 v4.19.256 by commit 7ff503dbfc1a07c28f34e7407a45de1579125b17. For more details please see the references link.