ASoC: meson: update axg sound card bindings

Remove the amlogic prefix in front of the generic properties and change
the card 'name' property to 'model'

Suggested-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>