sw64: LPC: support suspend and resume

Sunway inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I6ILCH



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Add function chip3_lpc_platform_suspend and chip3_lpc_platform_resume.
This change stores the lpc controller register values during suspend and
restores them when the machine wakes up.

Signed-off-by: Xu Chenjiao <xuchenjiao@wxiat.com>
Reviewed-by: He Sheng <hesheng@wxiat.com>
Signed-off-by: Gu Zitao <guzitao@wxiat.com>