!1179 MAINTAINERS: update openEuler/MAINTAINERS for LoongArch

Merge Pull Request from: @lixuefeng-loongson 
 
Add LoongArch maintainers to openEuler/MAINTAINERS. 
 
Link:https://gitee.com/openeuler/kernel/pulls/1179 

Reviewed-by: Jialin Zhang <zhangjialin11@huawei.com> 
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com> 

openEuler/MAINTAINERS

@@ -67,6 +67,32 @@ Maintainers List
           first. When adding to this list, please keep the entries in
           alphabetical order.
 
+LoongArch ARCHITECTURE
+M:     Xuefeng Li <lixuefeng@loongson.cn>
+M:     Bibo Mao <maobibo@loongson.cn>
+M:     Hongchen Zhang <zhanghongchen@loongson.cn>
+S:     Maintained
+F:     arch/loongarch/
+F:     tools/arch/loongarch/
+F:     drivers/gpu/drm/loongson/
+F:     tools/perf/arch/loongarch/
+F:     drivers/irqchip/irq-loongson-*
+F:     drivers/irqchip/irq-loongarch-*
+F:     drivers/spi/spi-loongson.c
+F:     drivers/char/ipmi/btlock.h
+F:     drivers/char/ipmi/ipmi_si.h
+F:     drivers/char/ipmi/ipmi_si_intf.c
+F:     drivers/char/ipmi/ipmi_si_ls2k500.c
+F:     drivers/char/ipmi/kcs_bmc_ls2k500.h
+F:     drivers/gpio/gpio-loongson.c
+F:     drivers/i2c/busses/i2c-loongson.c
+F:     drivers/pci/controller/pci-loongson.c
+F:     drivers/input/serio/i8042-loongsonio.h
+F:     drivers/cpufreq/loongson3-acpi-cpufreq.c
+F:     drivers/firmware/efi/libstub/loongarch-stub.c
+F:     drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
+F:     drivers/platform/loongarch/loongson_generic_laptop.c
+
 SCHEDULER
 M:	zhengzucheng@huawei.com
 S:	Maintained