soc: qcom: rq_stats: add snapshot of run queue stats driver

Add a snapshot of msm_rq_stats driver as of msm-4.4 commit
<c605e110ab186049> (Merge "usb: gadget: composite: Return bcdUSB
 0x0310 for Superspeed and higher").

Change-Id: I723310d12616f61598b2815e5ed3024418966ecc
Signed-off-by: Kyle Yan <kyan@codeaurora.org>
diff --git a/include/linux/rq_stats.h b/include/linux/rq_stats.h
new file mode 100644
index 0000000..44cd842
--- /dev/null
+++ b/include/linux/rq_stats.h
@@ -0,0 +1,31 @@
+/* Copyright (c) 2011,2013-2014, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+struct rq_data {
+	unsigned int rq_avg;
+	unsigned long rq_poll_jiffies;
+	unsigned long def_timer_jiffies;
+	unsigned long rq_poll_last_jiffy;
+	unsigned long rq_poll_total_jiffies;
+	unsigned long def_timer_last_jiffy;
+	unsigned int hotplug_disabled;
+	int64_t def_start_time;
+	struct attribute_group *attr_group;
+	struct kobject *kobj;
+	struct work_struct def_timer_work;
+	int init;
+};
+
+extern spinlock_t rq_lock;
+extern struct rq_data rq_info;
+extern struct workqueue_struct *rq_wq;