ARM: dts: sun8i: h3: Enable USB OTG on the Beelink X2

This STB has a type A socket which acts as OTG.

Signed-off-by: Marcus Cooper <codekipper@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>