dt-bindings: remoteproc: qcom,adsp: bring back firmware-name

dt-bindings: remoteproc: qcom,adsp: bring back firmware-name

The firmware-name property was moved from common qcom,pas-common.yaml
binding to each device-specific schema, but the qcom,adsp.yaml was not
updated.

Fixes: cee616c68846 ("dt-bindings: remoteproc: qcom: adsp: move memory-region and firmware-name out of pas-common")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230713072242.11268-5-krzysztof.kozlowski@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>