MAINTAINERS: Add maintainer for Arm komeda driver

v4: Added git tree [Daniel Vetter]
v2: Adjusted the position of KOMEDA by alphabetical order

Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
[Updated entry to show that Mali Developers is a mailing list and
 to add myself as maintainer]
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>