gma500: Add the base elements of CDV hotplug support

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/gma500/psb_drv.h b/drivers/gpu/drm/gma500/psb_drv.h
index ab483c3..d3528a6 100644
--- a/drivers/gpu/drm/gma500/psb_drv.h
+++ b/drivers/gpu/drm/gma500/psb_drv.h
@@ -626,6 +626,11 @@
 	uint32_t msi_addr;
 	uint32_t msi_data;
 
+	/*
+	 * Hotplug handling
+	 */
+
+	struct work_struct hotplug_work;
 
 	/*
 	 * LID-Switch