wlan: fix for invalid gRateSupported

Minor Fix. supported gRate is fixed to include 54Mbps
This change should be propogated across all branches.

Also making the supported rates a static const array
so that these values aren't changed later in the code
and are initialized only once during the run.

Change-Id: I945e9a4d25b3a3bb93d65457de8ee64a439044e7
CRs-fixed: 502456
diff --git a/CORE/HDD/src/wlan_hdd_cfg80211.c b/CORE/HDD/src/wlan_hdd_cfg80211.c
index 0465f42..88435eb 100644
--- a/CORE/HDD/src/wlan_hdd_cfg80211.c
+++ b/CORE/HDD/src/wlan_hdd_cfg80211.c
@@ -1056,7 +1056,7 @@
 /* Check if rate is 11g rate or not */
 static int wlan_hdd_rate_is_11g(u8 rate)
 {
-    u8 gRateArray[8] = {12, 18, 24, 36, 48, 72, 96, 104}; /* actual rate * 2 */
+    static const u8 gRateArray[8] = {12, 18, 24, 36, 48, 72, 96, 108}; /* actual rate * 2 */
     u8 i;
     for (i = 0; i < 8; i++)
     {