drm/fsl-dcu: Convert to Linux IRQ interfaces

[ Upstream commit 03ac16e5 ]

Drop the DRM IRQ midlayer in favor of Linux IRQ interfaces. DRM's
IRQ helpers are mostly useful for UMS drivers. Modern KMS drivers
don't benefit from using it. DRM IRQ callbacks are now being called
directly or inlined.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-5-tzimmermann@suse.de


Stable-dep-of: ffcde9e4 ("drm: fsl-dcu: enable PIXCLK on LS1021A")
Signed-off-by: Sasha Levin <sashal@kernel.org>