MAINTAINERS: change in AMD ptdma maintainer

As 'Sanjay R Mehta' stepped down from the role of ptdma maintainer, I
request to be added as the new maintainer of AMD PTDMA.

Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/r/20240222083004.1907070-1-Basavaraj.Natikar@amd.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>