ASoC: sun8i-codec: Enable bus clock at STANDBY and higher bias

For codec variants that have a bus clock, that clock must be running to
receive interrupts. Since jack and mic accessory detection should work
even when no audio is playing, that means the bus clock should be
enabled any time the system is on.

Accomplish that by tying the bus clock to the runtime PM state, which is
then tied to the bias level not being OFF. Since the codec sets
idle_bias_on, bias will generally never be OFF. However, we can set
suspend_bias_off to maintain the power savings of gating the bus clock
during suspend, when we don't expect jack/accessory detection to work.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Ondřej Jirman <megi@xff.cz>
Link: https://msgid.link/r/20240302140042.1990256-3-megi@xff.cz
Signed-off-by: Mark Brown <broonie@kernel.org>

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