maintainers: Update list of maintainers for Corstone-1000

- Add new maintainer: Hugues KAMBA MPIANA
- Remove maintainer: Xueliang ZHONG
- Update contact information for current maintainer.

Signed-off-by: Hugues KAMBA MPIANA <hugues.kambampiana@arm.com>
diff --git a/board/armltd/corstone1000/MAINTAINERS b/board/armltd/corstone1000/MAINTAINERS
index 1cc9aaa..ede4b00 100644
--- a/board/armltd/corstone1000/MAINTAINERS
+++ b/board/armltd/corstone1000/MAINTAINERS
@@ -1,6 +1,6 @@
 CORSTONE1000 BOARD
 M:	Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
-M:	Xueliang Zhong <xueliang.zhong@arm.com>
+M:	Hugues Kamba Mpiana <hugues.kambampiana@arm.com>
 S:	Maintained
 F:	board/armltd/corstone1000/
 F:	include/configs/corstone1000.h