MAINTAINERS: drop Jerry as TTM maintainer

He unfortunately doesn't work for AMD any more.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/302519/?series=60097&rev=1
diff --git a/MAINTAINERS b/MAINTAINERS
index 965f3a9..3509335 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5370,7 +5370,6 @@
 DRM TTM SUBSYSTEM
 M:	Christian Koenig <christian.koenig@amd.com>
 M:	Huang Rui <ray.huang@amd.com>
-M:	Junwei Zhang <Jerry.Zhang@amd.com>
 T:	git git://people.freedesktop.org/~agd5f/linux
 S:	Maintained
 L:	dri-devel@lists.freedesktop.org