MAINTAINERS: Add maintainer information for LoongArch

Add the maintainer information for the LoongArch (LA or LArch for short)
architecture.
Reviewed-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

MAINTAINERS

@@ -11554,6 +11554,16 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/display/bridge/lontium,lt8912b.yaml
 F:	drivers/gpu/drm/bridge/lontium-lt8912b.c
 
+LOONGARCH
+M:	Huacai Chen <chenhuacai@kernel.org>
+R:	WANG Xuerui <kernel@xen0n.name>
+S:	Maintained
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson.git
+F:	arch/loongarch/
+F:	drivers/*/*loongarch*
+F:	Documentation/loongarch/
+F:	Documentation/translations/zh_CN/loongarch/
+
 LSILOGIC MPT FUSION DRIVERS (FC/SAS/SPI)
 M:	Sathya Prakash <sathya.prakash@broadcom.com>
 M:	Sreekanth Reddy <sreekanth.reddy@broadcom.com>