MAINTAINERS: Update mvpp2 driver email

I no longer use mw@semihalf.com email. Update
mvpp2 driver entry with my alternative address.

Signed-off-by: Marcin Wojtas <marcin.s.wojtas@gmail.com>
Link: https://lore.kernel.org/r/20231225225245.1606-1-marcin.s.wojtas@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>