thermal/drivers/generic-adc: Simplify with dev_err_probe()

Error handling in probe() can be a bit simpler with dev_err_probe().

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240709-thermal-probe-v1-12-241644e2b6e0@linaro.org


Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>