ASoC: cs35l56: Check for vendor-specific speaker ID value

ASoC: cs35l56: Check for vendor-specific speaker ID value

Call cs_amp_get_vendor_spkid() to get use a vendor-specific speaker ID
value, if one exists.

The speaker ID is used to load an appropriate set of firmware files for the
speakers, and is usually read from a GPIO. Some manufacturers are instead
using a custom UEFI variable for the speaker ID.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Message-ID: <20250909113039.922065-4-rf@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>