ARM64: dts: meson-gxm: Add Vega S96 board

The Tronsmart Vega S96 is a TV box derived from Amlogic q200 reference design.

Cc: support@tronsmart.com
Acked-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Oleg Ivanov <balbes-150@yandex.ru>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>