wlan: SAPHT40 2.4GHz:Add HT40 timer support

To move SAP from HT20 to HT40 Added HT40 timer support

Change-Id: I9cac15332c33cf9ca9d90cccb7256358d6f6b44e
CRs-Fixed: 760811
diff --git a/Kbuild b/Kbuild
index 9a665a9..0f0c5d7 100644
--- a/Kbuild
+++ b/Kbuild
@@ -661,6 +661,7 @@
 endif
 
 CDEFINES += -DFEATURE_WLAN_CH_AVOID
+CDEFINES += -DWLAN_FEATURE_AP_HT40_24G
 
 # Some kernel include files are being moved.  Check to see if
 # the old version of the files are present