arm64: dts: meson: vim3: make sound card common to all variants

The vim3 sound card definition should be same all the vim3 variants
Move the definition to the appropriate device tree file.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20200803142158.173402-1-jbrunet@baylibre.com