pxafb: use completion for LCD disable wait code

Signed-off-by: eric miao <[email protected]>
Cc: "Antonino A. Daplas" <[email protected]>
Cc: Russell King <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
diff --git a/drivers/video/pxafb.h b/drivers/video/pxafb.h
index b777641..f47f139 100644
--- a/drivers/video/pxafb.h
+++ b/drivers/video/pxafb.h
@@ -114,6 +114,8 @@
 	wait_queue_head_t	ctrlr_wait;
 	struct work_struct	task;
 
+	struct completion	disable_done;
+
 #ifdef CONFIG_CPU_FREQ
 	struct notifier_block	freq_transition;
 	struct notifier_block	freq_policy;