ASoC: Use schema reference for sound-name-prefix

Use schema reference for 'sound-name-prefix' property wherever
necessary.

Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Cc: Stephan Gerhold <stephan@gerhold.net>
Cc: Rob Herring <robh+dt@kernel.org>
Reviewed-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1630686919-19495-3-git-send-email-spujar@nvidia.com


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