Revert "ASoC: atmel: Remove system clock tree configuration for at91sam9g20ek"

This reverts commit bc7d0133 which is
commit c775cbf6 upstream.

It is reported to cause problems, so drop it from the 5.15.y tree for now.

Link: https://lore.kernel.org/r/845b3053-d47b-4717-9665-79b120da133b@sirena.org.uk


Reported-by: Mark Brown <broonie@kernel.org>
Cc: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Cc: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>