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This commit introduce new clockdevice interfaces for oneshot. - It can represent both `timer` and `alarm`. - It simplifies the implementation of timer driver. Timer driver do not need considering the time conversion between clock count, tick and timespec. - It sets timer align to the tick boundary to improve timer accuracy. - It can avoid using 64-bit division during timer expiration interrupt, improves performance and reduces interrupt latency. - It considers almost all multiplication overflow problems in time conversion without processing at the driver. Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>