MAINTAINERS: Add Chengchang Tang as Hisilicon RoCE maintainer

Add Chengchang Tang as Hisilicon RoCE maintainer.

Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
Link: https://lore.kernel.org/r/20231117080657.1844316-1-huangjunxian6@hisilicon.com


Signed-off-by: Leon Romanovsky <leon@kernel.org>