qcacmn: Fix number of vdev info in app reg for lowi

The actual number of vdev info allocated was less than the number
of vdevs that can be created for each soc, hence fix them, also
previously the arrays were allocated statically consuming
considerable amount of memory, fix them by allocating dynamically
with only number of vdevs per soc

Change-Id: I5ea735d44994211f76ce18460332624831742f7b
CRs-Fixed: 3285131

umac/wifi_pos/inc/wifi_pos_utils_i.h

@@ -61,8 +61,8 @@ struct wifi_pos_req_msg;
 #define wifipos_nofl_debug(params...) \
 	QDF_TRACE_DEBUG_NO_FL(QDF_MODULE_ID_WIFIPOS, params)
 
-#define OEM_APP_SIGNATURE_LEN      16
 #define OEM_APP_SIGNATURE_STR      "QUALCOMM-OEM-APP"
+#define OEM_APP_SIGNATURE_LEN      (sizeof(OEM_APP_SIGNATURE_STR) - 1)
 
 #ifndef OEM_DATA_RSP_SIZE
 #define OEM_DATA_RSP_SIZE 1724