[ck] Add myself as loongarch's maintainer

Hello, ....... Here are some of my contributions : 1. Prepare for support of loongarch architecture. 2. Added support for loongarch architecture base code. 3. Added support for loongarch architecture interrupt controller. 4. Added support for loongarch architecture pci controller. 5. Added support for loongarch architecture commissioning tool I hope I could get an opportunity to contribute more features to Anolis community under this new responsibility. PS: The list of files/directories I want to maintain is as follows: - arch/loongarch/* - drivers/irqchip/* - tools/perf/arch/loongarch/* - tools/objtool/arch/loongarch/* - tools/arch/loongarch/* - drivers/platform/loongarch/* [1] https://gitee.com/anolis/cloud-kernel/pulls/1646 [2] https://gitee.com/anolis/cloud-kernel/pulls/1658 [3] https://gitee.com/anolis/cloud-kernel/pulls/1722 [4] https://gitee.com/anolis/cloud-kernel/pulls/1750 [5] https://gitee.com/anolis/cloud-kernel/pulls/1785