dt-bindings: sram: Add Allwinner SRAM compatibles

The mmio-sram binding was added missing a few SRAM sections compatible for
allwinner SoCs. Let's add them.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/sram/sram.yaml

@@ -66,7 +66,11 @@ patternProperties:
           <vendor>,[<device>-]<usage>
         contains:
           enum:
+            - allwinner,sun4i-a10-sram-a3-a4
+            - allwinner,sun4i-a10-sram-c1
+            - allwinner,sun4i-a10-sram-d
             - allwinner,sun9i-a80-smp-sram
+            - allwinner,sun50i-a64-sram-c
             - amlogic,meson8-smp-sram
             - amlogic,meson8b-smp-sram
             - renesas,smp-sram