dt-bindings: remoteproc: qcom: adsp: move memory-region and firmware-name out of pas-common

Move memory-region and firmware-name definitions out of qcom,pas-common.yaml
since they will be redefined differently for SM8550 PAS bindings documentation.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221114-narmstrong-sm8550-upstream-remoteproc-v4-1-54154c08c0b7@linaro.org