arm64: allwinner: a64: Fix node with unit name and no reg property

This patch fix the warning "xxx has a unit name, but no reg property" by
removing "@0" from such node

Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>