arm64: allwinner: a64: Fix simple-bus unit address format error

This patch remove leading 0 of unit address and so remove
lots of warning when building DT with W=1.

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>