tracing: Fix a kernel doc warning

Add description for trace_array_put() parameter.

kernel/trace/trace.c:464: warning: Function parameter or member 'this_tr' not described in 'trace_array_put'

Link: https://lkml.kernel.org/r/20210112111202.23508-1-huobean@gmail.com



Signed-off-by: Bean Huo <beanhuo@micron.com>
[ Merged as one of the original fixes was already fixed by someone else ]
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>