drm/tilcdc: use pm_runtime_irq_safe()

tilcdc calls runtime PM get/put functions everywhere. Some of those
places will be called in irq context, crashing the driver.

As a quick fix, use pm_runtime_irq_safe() for tilcdc.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: NJyri Sarha <jsarha@ti.com>

drivers/gpu/drm/tilcdc/tilcdc_drv.c

@@ -227,6 +227,7 @@ static int tilcdc_load(struct drm_device *dev, unsigned long flags)
 	DBG("Maximum Pixel Clock Value %dKHz", priv->max_pixelclock);
 
 	pm_runtime_enable(dev->dev);
+	pm_runtime_irq_safe(dev->dev);
 
 	/* Determine LCD IP Version */
 	pm_runtime_get_sync(dev->dev);