drm: malidp: Remove event_list member from struct malidp_drm

This struct member managed to outlive the submission process without
being removed. It is useless.

Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>

drivers/gpu/drm/arm/malidp_drv.h

@@ -15,12 +15,12 @@
 
 #include <linux/mutex.h>
 #include <linux/wait.h>
+#include <drm/drmP.h>
 #include "malidp_hw.h"
 
 struct malidp_drm {
 	struct malidp_hw_device *dev;
 	struct drm_fbdev_cma *fbdev;
-	struct list_head event_list;
 	struct drm_crtc crtc;
 	wait_queue_head_t wq;
 	atomic_t config_valid;