riscv/cfi: cfi prctl enable prctls zero unused params#2

jaidTw merged 1 commit intosifive:riscv-glibc-2.39-cfisifive/riscv-glibc:riscv-glibc-2.39-cfifrom

deepak0414:cfi_fix_prctldeepak0414/riscv-glibc:cfi_fix_prctlCopy head branch name to clipboard