arm64: dts: qcom: sc7280: Rename sar sensor labels

To ease matching configuration of sysfs attributes for particular
sensor, match label reported by iio 'label' attribute with the location
label generated by ChromeOS config tool.

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220623223119.1858863-1-gwendal@chromium.org