tilegx: Add tty serial support for TILE-Gx on-chip UART

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index 8f49198..23479fa 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8293,6 +8293,7 @@
 F:	drivers/net/ethernet/tile/
 F:	drivers/rtc/rtc-tile.c
 F:	drivers/tty/hvc/hvc_tile.c
+F:	drivers/tty/serial/tilegx.c
 F:	drivers/usb/host/*-tilegx.c
 F:	include/linux/usb/tilegx.h