qcacld-3.0: Allow minimum value for dwell time for Ext Scan to be 0

This is qcacld-2.0 to qcacld-3.0 propagation

Currently min time for dwell time for ext scan is non-zero while it
is zero for all other type of scan. This patch makes min value for
dwell time for ext scan as zero and consistent with other scans.

Change-Id: I7b6f3681c56918af7cdc381d25d6b625a5bdbda3
CRs-Fixed: 923458

core/hdd/inc/wlan_hdd_cfg.h

@@ -2599,22 +2599,22 @@ enum dot11p_mode {
 
 #ifdef FEATURE_WLAN_EXTSCAN
 #define CFG_EXTSCAN_PASSIVE_MAX_CHANNEL_TIME_NAME      "gExtScanPassiveMaxChannelTime"
-#define CFG_EXTSCAN_PASSIVE_MAX_CHANNEL_TIME_MIN       (110)
+#define CFG_EXTSCAN_PASSIVE_MAX_CHANNEL_TIME_MIN       (0)
 #define CFG_EXTSCAN_PASSIVE_MAX_CHANNEL_TIME_MAX       (500)
 #define CFG_EXTSCAN_PASSIVE_MAX_CHANNEL_TIME_DEFAULT   (110)
 
 #define CFG_EXTSCAN_PASSIVE_MIN_CHANNEL_TIME_NAME      "gExtScanPassiveMinChannelTime"
-#define CFG_EXTSCAN_PASSIVE_MIN_CHANNEL_TIME_MIN       (60)
+#define CFG_EXTSCAN_PASSIVE_MIN_CHANNEL_TIME_MIN       (0)
 #define CFG_EXTSCAN_PASSIVE_MIN_CHANNEL_TIME_MAX       (500)
 #define CFG_EXTSCAN_PASSIVE_MIN_CHANNEL_TIME_DEFAULT   (60)
 
 #define CFG_EXTSCAN_ACTIVE_MAX_CHANNEL_TIME_NAME       "gExtScanActiveMaxChannelTime"
-#define CFG_EXTSCAN_ACTIVE_MAX_CHANNEL_TIME_MIN        (40)
+#define CFG_EXTSCAN_ACTIVE_MAX_CHANNEL_TIME_MIN        (0)
 #define CFG_EXTSCAN_ACTIVE_MAX_CHANNEL_TIME_MAX        (110)
 #define CFG_EXTSCAN_ACTIVE_MAX_CHANNEL_TIME_DEFAULT    (40)
 
 #define CFG_EXTSCAN_ACTIVE_MIN_CHANNEL_TIME_NAME       "gExtScanActiveMinChannelTime"
-#define CFG_EXTSCAN_ACTIVE_MIN_CHANNEL_TIME_MIN        (20)
+#define CFG_EXTSCAN_ACTIVE_MIN_CHANNEL_TIME_MIN        (0)
 #define CFG_EXTSCAN_ACTIVE_MIN_CHANNEL_TIME_MAX        (110)
 #define CFG_EXTSCAN_ACTIVE_MIN_CHANNEL_TIME_DEFAULT    (20)
 #endif