tracing: Remove unnecessary DEBUG_FS dependency

Tracing replaced debugfs with tracefs.

Change-Id: Ib48c47f19654569d76aa1c9b9389e3573870953c
Signed-off-by: Kusanagi Kouichi <slash@ac.auone-net.jp>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20191120104350753.EWCT.12796.ppp.dion.ne.jp@dmta0009.auone-net.jp


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Git-commit: 0e4a459f56c32d3e52ae69a4b447db2f48a65f44
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


[prsood@codeaurora.org: keep CONFIG_DEBUG_FS enabled in perf for bengal(32 bit), kona, kona-iot]
Signed-off-by: Prateek Sood <prsood@codeaurora.org>