ARM: dts: sun8i: a23-a33: Add SRAM controller node and C1 SRAM region

This adds a SRAM controller node for the A23 and A33, with support for
the C1 SRAM region that is shared between the Video Engine and the CPU.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
[Maxime: Fixed the prefix and the compatibles]
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>