f2fs: add f2fs_destroy_trace_ios to free radix tree

This patch removes radix tree after finishing tracing IOs.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --cc fs/f2fs/super.c
Simple merge

diff --cc fs/f2fs/trace.c
Simple merge

diff --cc fs/f2fs/trace.h
Simple merge