dt-bindings: sram: sunxi-sram: Add A523 compatible

The Allwinner A523 family of SoCs have their "system control" registers
compatible to the A64 SoC, so add the new SoC specific compatible string.

Reviewed-by: Andre Przywara <[email protected]>
Signed-off-by: Yixun Lan <[email protected]>
Acked-by: Krzysztof Kozlowski <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Chen-Yu Tsai <[email protected]>

Author: dlan17

Documentation/devicetree/bindings/sram/allwinner,sun4i-a10-system-control.yaml

@@ -50,6 +50,7 @@ properties:
           - enum:
               - allwinner,sun50i-a100-system-control
               - allwinner,sun50i-h6-system-control
+              - allwinner,sun55i-a523-system-control
           - const: allwinner,sun50i-a64-system-control
 
   reg: