gma500: Turn on the IRQ for everything

Keep this as a patch of its own in case of bug reports.
Signed-off-by: NAlan Cox <alan@linux.intel.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

drivers/gpu/drm/gma500/psb_drv.c

@@ -356,8 +356,8 @@ static int psb_driver_load(struct drm_device *dev, unsigned long chipset)
 	PSB_WVDC32(0x00000000, PSB_INT_ENABLE_R);
 	PSB_WVDC32(0xFFFFFFFF, PSB_INT_MASK_R);
 	spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
-	if (IS_PSB(dev) && drm_core_check_feature(dev, DRIVER_MODESET))
-		drm_irq_install(dev);
+
+	drm_irq_install(dev);
 
 	dev->vblank_disable_allowed = 1;