[Depends on 62522] zephyr: cavs: add secondary core context save support

[RanderWang]

Register pm_state_notifier to set ready_flag for secondary core when it is powered up for second time after first fw boot. We can remove CONFIG_ADSP_IMR_CONTEXT_SAVE check for cavs platform for this feature.

zephyr side pr: zephyrproject-rtos/zephyr#62522

It has been discussed in #8156 and #8170

The IMR_CONTEXT_SAVE check was first introduced by #8027

[kv2019i]

Thanks @RanderWang ! Have you made a test PR that combines this PR with a Zephyr update pointing to your Zephyr patch (like I did #8136 ). This would good step to make to ensure the combination passes all SOF CI tests.

The patch itself looks good. I won't mark approve yet to ensure this isn't accidentally merged too soon, but yes, looks good.

[RanderWang]

Thanks @RanderWang ! Have you made a test PR that combines this PR with a Zephyr update pointing to your Zephyr patch (like I did #8136 ). This would good step to make to ensure the combination passes all SOF CI tests.

The patch itself looks good. I won't mark approve yet to ensure this isn't accidentally merged too soon, but yes, looks good.

@kv2019i I tested it in local environment. Current Github CI test doesn't use multi-core topology so we can't depend on Github CI.
My next plan is to add multi-core support in cavs-nocodec and remove cavs-nocodec-multicore topology as we have discussed

[lgirdwood]

@andyross need your re-review on the Zephyr dependecy to unblock this target for 3rd party SDV usage. Thanks !
@cujomalainey fyi.

[RanderWang]

@lgirdwood @kv2019i I tested this PR with multi-core tplg #8240 (include recent zephyr cavs multicore changes). All tests passed. Next I will update the west for zephyr and try to merge the topology PR. The dependent PR: zephyrproject-rtos/zephyr#62522 was merged.
Thanks!

[kv2019i]

Looks good! I guess we can merge this already now, and merge the Zephyr part independently @RanderWang ?

[RanderWang]

Looks good! I guess we can merge this already now, and merge the Zephyr part independently @RanderWang ?

sure. Zephyr part has been merged. Thanks!

[kv2019i]

@RanderWang I now pushed #8463 . The Zephyr change does not become visible to SOF until we bring it in via west.yml. Not sure whether we can merged this and #8463 independently, do we need to merge in particular order, or even at the same time...?

[RanderWang]

@RanderWang I now pushed #8463 . The Zephyr change does not become visible to SOF until we bring it in via west.yml. Not sure whether we can merged this and #8463 independently, do we need to merge in particular order, or even at the same time...?

@kv2019i This PR is for multi-core feature and depends on topology to enable multi-core path. Now our topology is not merged and waiting for this PR so CI doesn't get any error. (topology PR: #8240)