wlan: Add ini parametr to configure dwell time for first time

Add ini parameter, gIntialDwellTime, to configure dwell time
for the first time. By updating this parameter, we are configuring
maxChnTime(max channel time).

By default this parameter is set to 0, meaning maxChnTime will
be set to default value.

Change-Id: I53f6e1a946c7e186a2fa288c9b713260cf0741b7
CRs-Fixed: 626669
(cherry picked from commit daf431a0993a32c83bef52eff2575f736e2db222)
(cherry picked from commit 4b4912d1035d78a04d40f8d4be0b10d71863745e)
diff --git a/CORE/SME/inc/csrInternal.h b/CORE/SME/inc/csrInternal.h
index 35960bd..a5f3bd3 100644
--- a/CORE/SME/inc/csrInternal.h
+++ b/CORE/SME/inc/csrInternal.h
@@ -577,6 +577,8 @@
     tANI_U32  nActiveMinChnTime;     //in units of milliseconds
     tANI_U32  nActiveMaxChnTime;     //in units of milliseconds
 
+    tANI_U32  nInitialDwellTime;     //in units of milliseconds
+
     tANI_U32  nActiveMinChnTimeBtc;     //in units of milliseconds
     tANI_U32  nActiveMaxChnTimeBtc;     //in units of milliseconds
     tANI_U8   disableAggWithBtc;