CHROMIUM: drm: Fix -Wstrict-prototypes warning

ToT clang is complaining about missing 'void' in
function prototype.

/function declaration without a prototype is deprecated
in all versions of C [-Werror,-Wstrict-prototypes]
 void drm_trace_cleanup()
                       ^
                       void

BUG=b:230345382
TEST=CQ, llvm tot test

Signed-off-by: Manoj Gupta <manojgupta@google.com>
Change-Id: Id74af6360d40f9a1cc4c094f89c5f8a2822cb89d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/3611125
Auto-Submit: Manoj Gupta <manojgupta@chromium.org>
Tested-by: Manoj Gupta <manojgupta@chromium.org>
Commit-Queue: Guenter Roeck <groeck@chromium.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
1 file changed