mc146818rtc: embrace all x86 specific code
Introduce a function, rtc_policy_slew_deliver_irq(), which delivers irq if LOST_TICK_POLICY_SLEW is used, as which is only supported on x86, other platforms call it will trigger a assert After that, we can move the x86 specific code to the common place Signed-off-by: NXiao Guangrong <xiaoguangrong@tencent.com> Message-Id: <20170510083259.3900-6-xiaoguangrong@tencent.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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