[alsa-devel] set power_save_node=0 as default

[Kailang]

Hi Takashi,

I measured power consumption between power_save_node=1 and power_save_node=0.
It's almost the same.
Codec will enter to runtime suspend and suspend.
That pin also will enter to D3. Don't need to enter to D3 by single pin.
So, Disable power_save_node as default. It will avoid more issues.
Windows Driver also has not this option at runtime PM.

Many Thanks.

BR,
Kailang
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