usb: chipidea: add tx/rx burst size configuration interface

The user can adjust it through dts or platform data

Signed-off-by: Peter Chen <peter.chen@freescale.com>
diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h
index 1320a4db..62f2a7b 100644
--- a/drivers/usb/chipidea/ci.h
+++ b/drivers/usb/chipidea/ci.h
@@ -51,6 +51,7 @@
 	OP_DEVICEADDR,
 	OP_ENDPTLISTADDR,
 	OP_TTCTRL,
+	OP_BURSTSIZE,
 	OP_PORTSC,
 	OP_DEVLC,
 	OP_OTGSC,