board/freescale: Remove invalid fsl email addresses

These fsl email addresses are no longer valid and they do not have a
correspondent nxp.com entry.

Remove all invalid fsl email addresses and mark the boards as orphan.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
diff --git a/board/freescale/t4rdb/MAINTAINERS b/board/freescale/t4rdb/MAINTAINERS
index 53ccabc..4ba5c3a 100644
--- a/board/freescale/t4rdb/MAINTAINERS
+++ b/board/freescale/t4rdb/MAINTAINERS
@@ -1,6 +1,6 @@
 T4RDB BOARD
-M:	Chunhe Lan <Chunhe.Lan@freescale.com>
-S:	Maintained
+#M:	Chunhe Lan <Chunhe.Lan@freescale.com>
+S:	Orphan (since 2018-05)
 F:	board/freescale/t4rdb/
 F:	include/configs/T4240RDB.h
 F:	configs/T4160RDB_defconfig