dt-bindings: mtd: jedec,spi-nor: add optional vcc-supply

Introduce optional vcc-supply property, SPI NOR flashes needs power supply
to work properly. The power supply maybe software controlable per board
design.

Acked-by: Rob Herring (Arm) <[email protected]>
Signed-off-by: Peng Fan <[email protected]>
Signed-off-by: Tudor Ambarus <[email protected]>
Reviewed-by: Pratyush Yadav <[email protected]>
Signed-off-by: Pratyush Yadav <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: MrVan

Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml

@@ -96,6 +96,10 @@ properties:
       If "broken-flash-reset" is present then having this property does not
       make any difference.
 
+  vcc-supply:
+    description:
+      Supply for the SPI NOR power.
+
   spi-cpol: true
   spi-cpha: true