usb: pd: Add DP lane number notification

Add DP lane number notification which can be used in the
case that need to know DP lane number.

Change-Id: Iec66cbf6a34ca6c4346fa93f7706f3aff9f6a775
Signed-off-by: Liangliang Lu <luliang@codeaurora.org>
diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
index 5135571..99c0b9f 100644
--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -482,7 +482,7 @@
 }
 EXPORT_SYMBOL_GPL(extcon_sync);
 
-int extcon_blocking_sync(struct extcon_dev *edev, unsigned int id, bool val)
+int extcon_blocking_sync(struct extcon_dev *edev, unsigned int id, u8 val)
 {
 	int index;