drm/omap: dmm_tiler: No need to check if irq is valid in omap_dmm_remove

The driver probe would fail if the irq is not available.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/gpu/drm/omapdrm/omap_dmm_tiler.c

@@ -636,8 +636,7 @@ static int omap_dmm_remove(struct platform_device *dev)
 		if (omap_dmm->dummy_page)
 			__free_page(omap_dmm->dummy_page);
 
-		if (omap_dmm->irq > 0)
-			free_irq(omap_dmm->irq, omap_dmm);
+		free_irq(omap_dmm->irq, omap_dmm);
 
 		iounmap(omap_dmm->base);
 		kfree(omap_dmm);