arm64: dts: meson: p241: add sound support

Add the p241 sound card support. This board can play audio through HDMI
and the internal DAC.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20211130100159.214489-3-jbrunet@baylibre.com