ARM: dts: sun8i: v3s: Remove skeleton and memory to avoid warnings

Our memory node will generate a warning in DTC since the unit address is
not matching the reg property. However, that node will be created by the
bootloader, so we can just remove it entirely in order to remove that
warning.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>