wlan: Use system time instead of jiffies for BSS received time

During late suspend jiffies will not be incremented. Because of this
scan results are not age out as the delta of current time and the BSS
received time is not correct.

To address this, use the system time instead of jiffies for the
BSS received time and also make sure to use system time in all
other functions.

CRs-Fixed: 1018460
Change-Id: Ia14b84f1039dc4ffec6ad63550fed21e932f8012
diff --git a/CORE/HDD/src/wlan_hdd_scan.c b/CORE/HDD/src/wlan_hdd_scan.c
index 39e2f39..46c0614 100644
--- a/CORE/HDD/src/wlan_hdd_scan.c
+++ b/CORE/HDD/src/wlan_hdd_scan.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012-2015 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2012-2016 The Linux Foundation. All rights reserved.
  *
  * Previously licensed under the ISC license by Qualcomm Atheros, Inc.
  *
@@ -514,7 +514,7 @@
    event.cmd = IWEVCUSTOM;
    p = custom;
    p += scnprintf(p, MAX_CUSTOM_LEN, " Age: %lu",
-                 vos_timer_get_system_ticks() - descriptor->nReceivedTime);
+                 vos_timer_get_system_time() - descriptor->nReceivedTime);
    event.u.data.length = p - custom;
    current_event = iwe_stream_add_point (scanInfo->info,current_event, end,
                                          &event, custom);