drm/sun4i: Remove unneeded semicolon in sun8i_mixer.c

Fixes coccicheck warning:

drivers/gpu/drm/sun4i/sun8i_mixer.c:289:3-4: Unneeded semicolon
drivers/gpu/drm/sun4i/sun8i_mixer.c:292:2-3: Unneeded semicolon
drivers/gpu/drm/sun4i/sun8i_mixer.c:302:3-4: Unneeded semicolon
drivers/gpu/drm/sun4i/sun8i_mixer.c:305:2-3: Unneeded semicolon

Reported-by: Hulk Robot <[e-mail]>
Signed-off-by: zhengbin <[e-mail]>
Signed-off-by: Maxime Ripard <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/sun4i/sun8i_mixer.c

···
 			dev_err(drm->dev,
 				"Couldn't initialize overlay plane\n");
 			return ERR_CAST(layer);
-		};
+		}
 
 		planes[i] = &layer->plane;
-	};
+	}
 
 	for (i = 0; i < mixer->cfg->ui_num; i++) {
 		struct sun8i_ui_layer *layer;
···
 			dev_err(drm->dev, "Couldn't initialize %s plane\n",
 				i ? "overlay" : "primary");
 			return ERR_CAST(layer);
-		};
+		}
 
 		planes[mixer->cfg->vi_num + i] = &layer->plane;
-	};
+	}
 
 	return planes;
 }