ASoC: simple-card-utils: Unify clock direction by clk_direction

ASoC: simple-card-utils: Unify clock direction by clk_direction

Original sample-card assumes SND_SOC_CLOCK_IN is used for
snd_soc_dai_set_sysclk(), but someday, Codec uses SND_SOC_CLOCK_IN
and CPU uses SND_SOC_CLOCK_OUT at hw_params(), and dai->clk_direction
is used at simple_init_dai().

There is no uniformity today. Let's use dai->clk_direction for all cases.

Fortunately, almost all DAI doesn't care about "dir"
(= SND_SOC_CLOCK_IN/OUT) in .set_sysclk callback function (which is called
in snd_soc_dai_set_sysclk()), so this patch has no effect in such DAIs.

But this patch might breaks some existing Sound Card. Use
"system-clock-direction-out" property if it needs to use SND_SOC_CLOCK_OUT

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://patch.msgid.link/87y10lu0gx.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>