The node name should be generic thus rename STMPE ADC child to "adc".
Bindings will expect such name as well.

Link: https://lore.kernel.org/r/20230225164050.42522-1-krzysztof.kozlowski@linaro.orgSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>