power: reset: syscon-poweroff: simplify pdev->dev usage

Make the probe() code a bit simpler and shorter by storing all the
'&pdev->dev' as 'dev'.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230901120057.47018-2-krzysztof.kozlowski@linaro.org


Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>