ASoC: cs35l56: Remove support for A1 silicon

No product was ever released with A1 silicon so there is no
need for the driver to include support for it.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://patch.msgid.link/20240701104444.172556-3-rf@opensource.cirrus.com


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