msm_rmnet: add ioctl to enable/disable flow on prio qdisc

This ioctl provides a shorter route to enable/disable flow
on a given qdisc when compared to the traditional NETLINK
based communication. It is known to improve throughput when
data flow is throttled at a higher rate.

Change-Id: I8533887c8a7caffe3b17320dc044f28388ba8b83
CRs-Fixed: 355156
Acked-by: Jimi Shah <jimis@qualcomm.com>
Signed-off-by: Tianyi Gou <tgou@codeaurora.org>
diff --git a/include/linux/msm_rmnet.h b/include/linux/msm_rmnet.h
index 9f52464..063a8f1 100644
--- a/include/linux/msm_rmnet.h
+++ b/include/linux/msm_rmnet.h
@@ -40,6 +40,8 @@
 	RMNET_IOCTL_GET_OPMODE       = 0x000089F7, /* Get operation mode     */
 	RMNET_IOCTL_OPEN             = 0x000089F8, /* Open transport port    */
 	RMNET_IOCTL_CLOSE            = 0x000089F9, /* Close transport port   */
+	RMNET_IOCTL_FLOW_ENABLE	     = 0x000089FA, /* Flow enable	     */
+	RMNET_IOCTL_FLOW_DISABLE     = 0x000089FB, /* Flow disable	     */
 	RMNET_IOCTL_MAX
 };