drm: sun4i: Add support for suspending the display driver
Shut down the display engine during suspend. Signed-off-by:Ondrej Jirman <megous@megous.com> Signed-off-by:
Maxime Ripard <maxime@cerno.tech> Link: https://patchwork.freedesktop.org/patch/msgid/20191029112846.3604925-1-megous@megous.com
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