arm64: dts: qcom: sc7180: set ath10k output power calibration string

Add the string to load RF output power table for pazquel360 project.

Signed-off-by: Yunlong Jia <ecs.beijing2022@gmail.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230117085212.1.If242b1cd61b2e87e312dd9cf81e20301bae2a5a4@changeid