arm64: dts: qcom: msm8939: Fix CPU node "enable-method" property dependencies

The "spin-table" enable-method requires "cpu-release-addr" property,
so add a dummy entry. It is assumed the bootloader will fill in the
correct values.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Acked-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250410-dt-cpu-schema-v2-5-63d7dc9ddd0a@kernel.org


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