iio: dac: vf610: Simplify with devm_clk_get_enabled()

Driver is getting clock and almost immediately enabling it, with no
relevant code executed between, thus the probe path and cleanups can be
simplified with devm_clk_get_enabled().

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20250713-iio-clk-get-enabled-v1-4-70abc1f9ce6c@linaro.org


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>