ASoC: soc-dapm.c: merge dapm_power_one_widget() and dapm_widget_set_power()

dapm_widget_set_power() (= X) is called only from
dapm_power_one_widget() (= Y), and total purpose of these functions are
calling dapm_seq_insert() (= a) accordingly for each widget.

(X)	static void dapm_widget_set_power(...)
	{
		...
		if (power)
(a)			dapm_seq_insert(w, up_list, true);
		else
(a)			dapm_seq_insert(w, down_list, false);
	}

(Y)	static void dapm_power_one_widget(...)
	{
		..

		switch (w->id) {
		case snd_soc_dapm_pre:
(a)			dapm_seq_insert(w, down_list, false);
			break;
		case snd_soc_dapm_post:
(a)			dapm_seq_insert(w, up_list, true);
			break;

		default:
			power = dapm_widget_power_check(w);

(X)			dapm_widget_set_power(w, power, up_list, down_list);
			break;
		}
	}

It should be more simple, but the code is unnecessarily complicated,
and difficult to read/understand. This patch merge these into one.

Link: https://lore.kernel.org/all/[email protected]/
Signed-off-by: Kuninori Morimoto <[email protected]>
Reviewed-by: Amadeusz Sławiński <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

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