drm/exynos: add pm_runtime to DECON 5433
Let pm_runtime handle the enabling/disabling of the device with proper refcnt instead of rely on specific flags to track the enabled state. Changelog v3: - Change CONFIG_PM_SLEEP -> CONFIG_PM Changelog v2: - no change Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Signed-off-by: Inki Dae <inki.dae@samsung.com>
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