qcacld-3.0: Append vendor specific IEs received to assoc request

wpa_supplicant/framework sends different vendor specific IEs in
connect request. Currently driver is parsing the IEs and appending
specific IEs to the assoc request frame. But all vendor specific
IEs are supposed to be sent in the assoc request. Extract all vendor
specific IEs and append at the end of the frame.
MBO IEs are expected to be present at the end of the frame.
So append rest of the vendor IEs just before MBO IE.

Change-Id: I3d49c72a31d142ef3b14b439af2ae4cd8be059ea
CRs-Fixed: 2498976

mlme/dispatcher/inc/wlan_mlme_public_struct.h

@@ -57,6 +57,7 @@
 #define CFG_MAX_TX_POWER_5_LEN      128
 #define CFG_POWER_USAGE_MAX_LEN      4
 #define CFG_MAX_STR_LEN       256
+#define MAX_VENDOR_IES_LEN 1532
 
 #define CFG_VALID_CHANNEL_LIST_STRING_LEN (CFG_VALID_CHANNEL_LIST_LEN * 4)
 /**