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Check the CPUCFG2_SCQ bit to determine if the current CPU supports the SC.Q instruction. Reviewed-by: Hengqi Chen <hengqi.chen@gmail.com> Tested-by: Hengqi Chen <hengqi.chen@gmail.com> Co-developed-by: Yangyang Lian <lianyangyang@kylinos.cn> Signed-off-by: Yangyang Lian <lianyangyang@kylinos.cn> Signed-off-by: George Guo <guodongtai@kylinos.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> Signed-off-by: maoxiaochuan <maoxiaochuan@loongson.cn>