MAINTAINERS: Add entry for Andes SoC

Add entry for Andes SoC maintainer and related files

Signed-off-by: Ben Zong-You Xie <ben717@andestech.com>
Link: https://lore.kernel.org/r/20250711133025.2192404-10-ben717@andestech.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Author: ben717-linux

MAINTAINERS

@@ -21285,6 +21285,15 @@ F:	drivers/irqchip/irq-riscv-intc.c
 F:	include/linux/irqchip/riscv-aplic.h
 F:	include/linux/irqchip/riscv-imsic.h
 
+RISC-V ANDES SoC Support
+M:	Ben Zong-You Xie <ben717@andestech.com>
+S:	Maintained
+T:	git: https://github.com/ben717-linux/linux
+F:	Documentation/devicetree/bindings/interrupt-controller/andestech,plicsw.yaml
+F:	Documentation/devicetree/bindings/riscv/andes.yaml
+F:	Documentation/devicetree/bindings/timer/andestech,plmt0.yaml
+F:	arch/riscv/boot/dts/andes/
+
 RISC-V ARCHITECTURE
 M:	Paul Walmsley <paul.walmsley@sifive.com>
 M:	Palmer Dabbelt <palmer@dabbelt.com>