wlan: Checkpatch fixes for WLAN prima LA driver

The diff contains fixes for the following 2 checkpatch errors:

1) WARNING: __packed is preferred over __attribute__((packed))

2) WARNING: Statements terminations use 1 semicolon

Change-Id: I711d060af60b09b680daca675c79eea78c9009b9
CR-Fixed: NA
diff --git a/CORE/HDD/src/wlan_hdd_scan.c b/CORE/HDD/src/wlan_hdd_scan.c
index e463c94..23463cb 100644
--- a/CORE/HDD/src/wlan_hdd_scan.c
+++ b/CORE/HDD/src/wlan_hdd_scan.c
@@ -389,7 +389,7 @@
       {
           int i;
 
-          numBasicRates = pDot11SuppRates->num_rates;;
+          numBasicRates = pDot11SuppRates->num_rates;
           for (i=0; i<pDot11SuppRates->num_rates; i++)
           {
               if (0 != (pDot11SuppRates->rates[i] & 0x7F))