MAINTAINERS: Add device tree bindings to mv88e6xx section

Also include the netdev list for convenience, as done elsewhere.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Cc: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -7567,8 +7567,10 @@ S:	Maintained
 MARVELL 88E6XXX ETHERNET SWITCH FABRIC DRIVER
 M:	Andrew Lunn <andrew@lunn.ch>
 M:	Vivien Didelot <vivien.didelot@savoirfairelinux.com>
+L:	netdev@vger.kernel.org
 S:	Maintained
 F:	drivers/net/dsa/mv88e6xxx/
+F:	Documentation/devicetree/bindings/net/dsa/marvell.txt
 
 MARVELL ARMADA DRM SUPPORT
 M:	Russell King <rmk+kernel@armlinux.org.uk>