drm/vc4: hvs: Remove dlist setup duplication

Setting the DISPLISTx register needs to occur in every case, and we
don't need to protect the register using the event_lock, so we can just
move it after the if branches and simplify a bit the function.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20220331143744.777652-5-maxime@cerno.tech

drivers/gpu/drm/vc4/vc4_hvs.c

@@ -402,14 +402,11 @@ static void vc4_hvs_update_dlist(struct drm_crtc *crtc)
 			crtc->state->event = NULL;
 		}
 
-		HVS_WRITE(SCALER_DISPLISTX(vc4_state->assigned_channel),
-			  vc4_state->mm.start);
-
 		spin_unlock_irqrestore(&dev->event_lock, flags);
-	} else {
+	}
+
 	HVS_WRITE(SCALER_DISPLISTX(vc4_state->assigned_channel),
 		  vc4_state->mm.start);
-	}
 
 	spin_lock_irqsave(&vc4_crtc->irq_lock, flags);
 	vc4_crtc->current_dlist = vc4_state->mm.start;