MAINTAINERS: drop Wenyou Yang from Atmel NAND driver support

Mails to wenyou.yang@microchip.com are not deliverable.
Drop him as Microchip/Atmel NAND controller driver maintainer.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Boris Brezillon <boris.brezillon@bootlin.com>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

MAINTAINERS

@@ -9345,7 +9345,6 @@ F:	drivers/media/platform/atmel/atmel-isc-regs.h
 F:	devicetree/bindings/media/atmel-isc.txt
 
 MICROCHIP / ATMEL NAND DRIVER
-M:	Wenyou Yang <wenyou.yang@microchip.com>
 M:	Josh Wu <rainyfeeling@outlook.com>
 L:	linux-mtd@lists.infradead.org
 S:	Supported