dt-bindings: Add vendor prefix for Microsemi Corporation

Microsemi Corporation provides semiconductor and system solutions for
aerospace & defense, communications, data center and industrial markets.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Rob Herring <robh@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Allan Nielsen <Allan.Nielsen@microsemi.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/18853/Signed-off-by: James Hogan <jhogan@kernel.org>

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -224,6 +224,7 @@ motorola	Motorola, Inc.
 moxa	Moxa Inc.
 mpl	MPL AG
 mqmaker	mqmaker Inc.
+mscc	Microsemi Corporation
 msi	Micro-Star International Co. Ltd.
 mti	Imagination Technologies Ltd. (formerly MIPS Technologies Inc.)
 multi-inno	Multi-Inno Technology Co.,Ltd