Add beacon filter for channel width change in VHT operation IE

Add support for handling the channel width change in VHT operation
IE. Updates the channel width whenever AP advertises the change in
channel width in VHT operation IE in the beacon.

Change-Id: I21aeb33dd039065051f9f0c69ad8f208d3950b92
CRs-Fixed: 496042
diff --git a/CORE/MAC/src/pe/lim/limSendMessages.h b/CORE/MAC/src/pe/lim/limSendMessages.h
index d2d12fa..37b5b3e 100644
--- a/CORE/MAC/src/pe/lim/limSendMessages.h
+++ b/CORE/MAC/src/pe/lim/limSendMessages.h
@@ -101,6 +101,7 @@
 #define HT_BYTE2_FILTER_MASK    0xEB
 #define HT_BYTE5_FILTER_MASK    0xFD
 #define DS_PARAM_CHANNEL_MASK   0x0
+#define VHTOP_CHWIDTH_MASK      0xFC
 
 tSirRetStatus limSendBeaconFilterInfo(tpAniSirGlobal pMac, tpPESession psessionEntry);