On Mon, Mar 29, 2021 at 08:09:26AM +0000, Jack Yu wrote:

...

Bindings should also be sent to the DT list. get_maintainer.pl will tell you this.

1. Does it mean I should add my name in MAINTAINERS?

It means you should have sent the patch with the binding changes to the DT list and maintainers as well as everyone else.

2. Is below warning message caused by #1 question?

No, it's the content of the change that's introduced problems in the binding.