dt-bindings: nvmem: rmem: Add raspberrypi,bootloader-public-key

On RPi4 the bootloader[1] will copy the binary public key blob
(if present) into memory location specified by this node, for
use by the OS.

[1] https://www.raspberrypi.com/documentation/computers/configuration.html#nvmem-nodesSigned-off-by: Ivan T. Ivanov <iivanov@suse.de>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Message-ID: <20230611140330.154222-7-srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/nvmem/rmem.yaml

@@ -17,6 +17,7 @@ properties:
     items:
       - enum:
           - raspberrypi,bootloader-config
+          - raspberrypi,bootloader-public-key
       - const: nvmem-rmem
 
   reg: