hw/loongarch: Add numa support

1. Implement some functions for LoongArch numa support;
2. Implement fdt_add_memory_node() for fdt;
3. build_srat() fills node_id and adds build numa memory.

Reviewed-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20230613122613.2471743-1-zhaotianrui@loongson.cn>
3 files changed