MAINTAINERS: Maintainer change for hisi_dma

I am moving on to other things and longfang is going to
take over the role of hisi_dma maintainer. Update the
MAINTAINERS accordingly.

Signed-off-by: Jie Hai <haijie1@huawei.com>
Acked-by: Zhou Wang <wangzhou1@hisilicon.com>
Link: https://lore.kernel.org/r/20250402085423.347526-1-haijie1@huawei.com


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