wlan: Add qwlanfw_defs.h to resolve the compiler error

Compilation Error. Change 664372 (Promote request by stng) removes the
"qwlanfw_defs.h" in rel/2.0 API branch. This is causing compilation
error as no qwlanfw_defs.h is present on the host side

Change-Id: I35f0a91424ec11785bb8d6a7e93a747c9db44efa
CR-Fixed: 434878
diff --git a/riva/inc/wlan_phy.h b/riva/inc/wlan_phy.h
index 3eb5cce..c01708e 100644
--- a/riva/inc/wlan_phy.h
+++ b/riva/inc/wlan_phy.h
@@ -46,9 +46,9 @@
 
 Contains definitions of all PHY related structures that aree needed by FTM/PTT
 
-Copyright (c) 2007 QUALCOMM Incorporated. 
-All Rights Reserved. 
-Qualcomm Confidential and Proprietary 
+Copyright (c) 2007 Qualcomm Technologies, Inc. All Rights Reserved. 
+Qualcomm Technologies Proprietary and Confidential
+
 ============================================================================*/
 #include <wlan_nv.h>
  
@@ -916,4 +916,14 @@
 #define MAX_TPC_GAIN_LUT_DBM_2DEC_PLACES    (MAX_TPC_GAIN_LUT_DBM * 100)
 #define MIN_TPC_GAIN_LUT_DBM_2DEC_PLACES    (MIN_TPC_GAIN_LUT_DBM * 100)
 
+typedef enum
+{
+    RF_BANDWIDTH_20MHZ = 20,
+    RF_BANDWIDTH_40MHZ = 40,
+    RF_BANDWIDTH_80MHZ = 80,
+    RF_MIN_BANDWIDTH = RF_BANDWIDTH_20MHZ,
+    RF_MAX_BANDWIDTH = RF_BANDWIDTH_80MHZ,
+    RF_BANDWIDTH_INVALID = 0x7FFFFFFF
+}eRfBandwidth;
+
 #endif /* WLAN_PHY_H */