MAINTAINERS: ARM/MStar/Sigmastar SoCs: Add a link to the MStar tree

Add a link to the MStar tree on github.

Signed-off-by: Daniel Palmer <daniel@0x0f.com>
Reviewed-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

MAINTAINERS

@@ -2168,6 +2168,7 @@ M:	Daniel Palmer <daniel@thingy.jp>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
 W:	http://linux-chenxing.org/
+T:	git git://github.com/linux-chenxing/linux.git
 F:	Documentation/devicetree/bindings/arm/mstar/*
 F:	Documentation/devicetree/bindings/clock/mstar,msc313-mpll.yaml
 F:	Documentation/devicetree/bindings/gpio/mstar,msc313-gpio.yaml