rv/monitor: Add __init/__exit annotations to module init/exit funcs

Add missing __init/__exit annotations to module init/exit funcs.

Link: https://lkml.kernel.org/r/20220922103208.162869-1-xiujianfeng@huawei.com

Fixes: 24bce201 ("tools/rv: Add dot2k")
Fixes: 8812d212 ("rv/monitor: Add the wip monitor skeleton created by dot2k")
Fixes: ccc319dc

 ("rv/monitor: Add the wwnr monitor")
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Acked-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>