ARM: dts: qcom: fix thermal zones naming

Rename thermal zones according to dt-schema.

Fix warnings like:
arch/arm/boot/dts/qcom-apq8064-cm-qs600.dt.yaml: thermal-zones: 'cpu-thermal0', 'cpu-thermal1', 'cpu-thermal2', 'cpu-thermal3' do not match any of the regexes: '^[a-zA-Z][a-zA-Z0-9\\-]{1,12}-thermal$', 'pinctrl-[0-9]+'
        From schema: Documentation/devicetree/bindings/thermal/thermal-zones.yaml

Signed-off-by: David Heidelberg <david@ixit.cz>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211020180002.195467-1-david@ixit.cz