dt-bindings: remoteproc: qcom,q6v5: Move MSM8996 to schema

Convert MSM8996 and similar (MSM8998/SDM845) MSS PIL bindings to schema.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230117085840.32356-2-quic_sibis@quicinc.com