riscv: ftrace: Use ftrace_get_regs helper

Use ftrace_get_regs() helper call to get pt_regs from ftrace_regs struct,
this makes the code simpler.

Signed-off-by: Nanyong Sun <sunnanyong@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
1 file changed