ARM: sun8i: Move A23 AHB1 gates out of common DTSI

The AHB1 gates were assumed to be identical between the A23 and the A33,
which turned out to be wrong. Move the A23 gates definition to the A23
DTSI.

Reported-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>