MAINTAINERS: Add a maintainer for MSCC MIPS SoCs

Microsemi has been bought by Microchip and Microchip is supporting those
SoCs.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Woojung Huh <Woojung.Huh@microchip.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: James Hogan <jhogan@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-kernel@vger.kernel.org

MAINTAINERS

@@ -9801,8 +9801,9 @@ F:	drivers/dma/at_xdmac.c
 
 MICROSEMI MIPS SOCS
 M:	Alexandre Belloni <alexandre.belloni@bootlin.com>
+M:	Microchip Linux Driver Support <UNGLinuxDriver@microchip.com>
 L:	linux-mips@linux-mips.org
-S:	Maintained
+S:	Supported
 F:	arch/mips/generic/board-ocelot.c
 F:	arch/mips/configs/generic/board-ocelot.config
 F:	arch/mips/boot/dts/mscc/