projects: linux: core: cpuidle: Unblock, update

Disabling cpuible was just one possible mitigation for a system
controller issue, to prevent conflicts between powering off CPU cores or
the 3D Graphics Engine, and changing the state of another power domain
through SYSC, which could lead to CPG state machine lock-ups.  Other
mitigations are to make use of the new System Controller External
Request Mask Register, present in newer SoCs and SoC revisions, or to
keep some power areas always powered.

However, we believe this issue cannot happen in the upstream kernel, as
upstream has no support for graphics acceleration yet.

Hence this task became unblocked.

CPUidle for R-Car H3 and M3-W is in next.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

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