dt-bindings: firmware: qcom,scm: document SCM on X1E80100 SoCs

Document scm compatible for X1E80100 SoCs.

Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
Reviewed-by: Guru Das Srinagesh <quic_gurus@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231124100608.29964-5-quic_sibis@quicinc.com


Signed-off-by: Bjorn Andersson <andersson@kernel.org>