wlan: Add support to enable/disable RTT feature via gEnableRTTsupport

Define a new ini param to provide control over enabling and disabling
support for RTT. In cases where the framework did not support RTT but
firmware did, it resulted in failed test cases.

Change-Id: I0b88beabe1d4b3775cf9e6f46aa771426260e8fa
CRs-Fixed: 2145467
diff --git a/CORE/HDD/src/wlan_hdd_cfg.c b/CORE/HDD/src/wlan_hdd_cfg.c
index 5cb9d3d..c761ef2 100644
--- a/CORE/HDD/src/wlan_hdd_cfg.c
+++ b/CORE/HDD/src/wlan_hdd_cfg.c
@@ -3436,6 +3436,13 @@
                   CFG_SAP_SCAN_BAND_PREFERENCE_MIN,
                   CFG_SAP_SCAN_BAND_PREFERENCE_MAX ),
 
+   REG_VARIABLE(CFG_ENABLE_RTT_SUPPORT, WLAN_PARAM_Integer,
+                  hdd_config_t, enable_rtt_support,
+                  VAR_FLAGS_OPTIONAL,
+                  CFG_ENABLE_RTT_SUPPORT_DEFAULT,
+                  CFG_ENABLE_RTT_SUPPORT_MIN,
+                  CFG_ENABLE_RTT_SUPPORT_MAX ),
+
    REG_VARIABLE( CFG_ENABLE_DYNAMIC_RA_START_RATE_NAME, WLAN_PARAM_Integer,
                   hdd_config_t, enableDynamicRAStartRate,
                   VAR_FLAGS_OPTIONAL |