board: samsung: update the MAINTAINERS file

Update the maintainer from Przemyslaw and Lukasz to me.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
diff --git a/board/samsung/trats2/MAINTAINERS b/board/samsung/trats2/MAINTAINERS
index 7018300..ba17b4e 100644
--- a/board/samsung/trats2/MAINTAINERS
+++ b/board/samsung/trats2/MAINTAINERS
@@ -1,5 +1,5 @@
 TRATS2 BOARD
-M:	Lukasz Majewski <l.majewski@samsung.com>
+M:	Jaehoon Chung <jh80.chung@samsung.com>
 S:	Maintained
 F:	board/samsung/trats2/
 F:	include/configs/trats2.h