arm: mvebu: serial: Add me as co-maintainer and author of Marvell serial drivers

There is no maintainer entry for serial_mvebu_a3700.c. Add entry with Pali
and Stefan as maintainers.

Signed-off-by: Pali Rohár <pali@kernel.org>
Acked-by: Stefan Roese <sr@denx.de>
Reviewed-by: Stefan Roese <sr@denx.de>

MAINTAINERS

@@ -285,6 +285,13 @@ T:	git https://source.denx.de/u-boot/custodians/u-boot-marvell.git
 F:	drivers/pci/pci-aardvark.c
 F:	drivers/pci/pci_mvebu.c
 
+ARM MARVELL SERIAL DRIVERS
+M:	Pali Rohár <pali@kernel.org>
+M:	Stefan Roese <sr@denx.de>
+S:	Maintained
+T:	git https://source.denx.de/u-boot/custodians/u-boot-marvell.git
+F:	drivers/serial/serial_mvebu_a3700.c
+
 ARM MARVELL PXA
 M:	Marek Vasut <marex@denx.de>
 S:	Maintained

drivers/serial/serial_mvebu_a3700.c

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2016 Stefan Roese <sr@denx.de>
+ * Copyright (C) 2021 Pali Rohár <pali@kernel.org>
  */
 
 #include <common.h>