wlan: Profiling for roam delay calculation in vos module

Vos will provide the handler where time stamp can be stored
for various roaming event occurred as mention below from
various module like hdd/sme/lim/tl/wdi etc

1)preauth sent to new candidate
2)disable the transmit queues
3)disassoc to current AP and
4)reassoc to candidate AP
5)enable the transmit queue etc.

Change-Id: I6518c35c03e73831c5869071121428770f880631
CRs-Fixed: 688012
diff --git a/Kbuild b/Kbuild
index 646d0e9..2a9394d 100644
--- a/Kbuild
+++ b/Kbuild
@@ -64,6 +64,8 @@
 #Re-enable wifi on WDI timeout
 RE_ENABLE_WIFI_ON_WDI_TIMEOUT := 0
 
+#Measure Roam Delay
+MEASURE_ROAM_TIME_DELAY := 0
 
 ifeq ($(CONFIG_CFG80211),y)
 HAVE_CFG80211 := 1
@@ -655,6 +657,10 @@
 CDEFINES += -DCONFIG_ENABLE_LINUX_REG
 endif
 
+ifeq ($(MEASURE_ROAM_TIME_DELAY),1)
+CDEFINES += -DDEBUG_ROAM_DELAY
+endif
+
 CDEFINES += -DFEATURE_WLAN_CH_AVOID
 
 # Some kernel include files are being moved.  Check to see if