[PATCH] maintainers: update email address for PPC

[David Marchand]

Hello,

On Mon, Jun 10, 2024 at 5:37 PM David Christensen
<drc at linux.vnet.ibm.com> wrote:
>
> Modify email address to route email traffic through different
> internal email servers.

Please update .mailmap too.


-- 
David Marchand