dt-bindings: sram: Add compatible strings for the Meson AO ARC SRAM

Amlogic Meson8, Meson8b and Meson8m2 SoCs embed an ARC EM4 core
typically used for managing system suspend. A section of the SoCs SRAM
is mapped as memory for this ARC core. Add new compatible strings for
the SRAM section for the ARC core memory.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20210102205904.2691120-2-martin.blumenstingl@googlemail.com

Documentation/devicetree/bindings/sram/sram.yaml

@@ -72,6 +72,8 @@ patternProperties:
             - allwinner,sun4i-a10-sram-d
             - allwinner,sun9i-a80-smp-sram
             - allwinner,sun50i-a64-sram-c
+            - amlogic,meson8-ao-arc-sram
+            - amlogic,meson8b-ao-arc-sram
             - amlogic,meson8-smp-sram
             - amlogic,meson8b-smp-sram
             - amlogic,meson-gxbb-scp-shmem