drm/tidss: Don't use struct drm_device.irq_enabled

The field drm_device.irq_enabled is only used by legacy drivers
with userspace modesetting. Don't use it in tidss.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210625082222.3845-23-tzimmermann@suse.de

drivers/gpu/drm/tidss/tidss_irq.c

@@ -57,9 +57,6 @@ irqreturn_t tidss_irq_handler(int irq, void *arg)
 	unsigned int id;
 	dispc_irq_t irqstatus;
 
-	if (WARN_ON(!ddev->irq_enabled))
-		return IRQ_NONE;
-
 	irqstatus = dispc_read_and_clear_irqstatus(tidss->dispc);
 
 	for (id = 0; id < tidss->num_crtcs; id++) {