ASoC: atmel-i2s: Fix usage of capture and playback at the same time

[ Upstream commit 3b7961a326f8a7e03f54a19f02fedae8d488b80f ]

For both capture and playback streams to work at the same time, only the
needed values from a register need to be updated. Also, clocks should be
enabled only when the first stream is started and stopped when there is no
running stream.

Fixes: b543e467 ("ASoC: atmel-i2s: add driver for the new Atmel I2S controller")
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Link: https://lore.kernel.org/r/20210618150741.401739-2-codrin.ciubotariu@microchip.com


Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>